In an exclusive interview the former Big Brother star also said his 'toxic relationship' with Davis was over for good with no chance of any reconciliation.
The 24-year-old, who suffered a broken nose and fractured eye socket, poured his heart out to MailOnline as he recovered from his injuries at his family's home in Dublin.
He said the row with ex-Hollyoaks star Davis, arrested by police on suspicion of GBH, erupted soon after she broken the news to him that she was expecting. The couple already have a nine month old son Caben-Albi.
Arrested: Davis, 24, a mother of one, was pictured after her arrest for assault holding her stomach prompting speculation that she is pregnant. Her on off boyfriend McConnell said that their hotel room fight came after he told her she was expecting
Row: The pair were seen arguing in the street after drinking in a Wetherspoon's pub in the hours before Davis was arrested
Speaking from his home in Dublin, he said: 'She just told me that she was pregnant. I was pretty shocked as it wasn't planned, but to be honest I was excited. She told me that she was going to have a scan at the hospital later that afternoon. The pregnancy was not planned and given our history together took me by surprise. I was pleased, but still in a bit of a shock.
'Steph then looked at my phone and saw that I was following some other woman. She just went mental at me and kicked off.
'She was going mental I had not even met this woman but was just following her. She would not listen and stormed off to go to the pub and refused to go to the scan'
McConnell said he followed Davis to a local pub near to the Royal Chase Hotel in Enfield where they were staying.
'We were in the pub and having a few drinks. I had two or three and so did Steph which I thought was off as she was pregnant. She was also smoking and I told her a pregnant woman should not drink and smoke.
'She told me 'it was her life and she could do as she wanted.' McConnell said he left the pub and returned to the hotel without Davis who he claims continued drinking.
'When she came back to the hotel room she just flew at me. She was screaming and shouting and being abusive. 'She would not listed and for five to ten minutes just kept screaming at me.'
McConnell believes other guests at the hotel called police because they were so concerned about the noise from the rowing couple.
The Reality Star said: ' She was jumping on the bed and the wooden post snapped off. She picked it up and hit me across the face. It knocked me down, and I think I passed out for a bit because when I came round the police were already in the room. 'I did not call them so other people in the hotel who had heard all the shouting must have called. Step was still being aggressive and went for the police. They had to restrain her. My face was bleeding quite badly and I was in a lot of pain.'
Former Hollyoaks star Stephanie Davis was pictured leaving a police station with what appears to be a black eye and a scratched neck. She was spotted sporting the marks after being released on bail after allegedly assaulting her on/off boyfriend Jeremy McConnell following a row at the Royal Chace Hotel in Enfield, north London
Black eyes: Pictures also emerged of McConnell's injuries after he was allegedly assaulted by his girlfriend, former Hollyoaks actress Davis, who was arrested on Sunday
Witnesses said the reality TV went off in separate taxis after the drinking session in Enfield, north London on Sunday
The fight is said to have broken out at the Royal Chace Hotel in Enfield on Sunday after the pair were seen drinking in the town
Regulars at this pub said the pair were drinking together until around 9.30pm, when Jeremy left and Steph carried on with a group of women
He went on: 'But I swear I never laid a finger on her. I do not hit women and do not hit pregnant women. I did not touch her. 'Any marks that she has on her are self inflicted. I did not lay a finger on her.'
Other guests at the hotel have told MailOnline that so many police burst into the hotel they thought they were in the midst of a terror incident.
McConnell said police called an ambulance while other officers tried to restrain Davis. 'She went for them and was still kicking off. She was p++++d and out of control. I have never seen her like that before and she had completely lost it.'
Davis was arrested and taken to Enfield Police station. She was later rushed to hospital and released at 3am on Tuesday morning after being bailed until July.
Photos of Davis arriving at a friend's house showed her with scratch marks on her neck, face and nose and blood on the sleeve of her grey track suit top. In one photo she tenderly clutched her stomach.
Friends claimed she had been assaulted by McConnell and had suffered four of five broken ribs after the reality star went for her first.
They claimed the row began when McConnell smashed Davis's phone which contained treasured photos of their son.
McConnell insists he did not harm the former actress.
'There is not way I touched her. She was the one who attacked me. I did not punch her and touch her.'
McConnell, who flew back to Dublin soon after the incident, insists that his on-off relationship with Davis is beyond repair.
'There is no going back from this and we are finished,' he said. 'We are just not good for each other. The relationship is toxic and we can't be together anymore. I don't care what happens there will be no getting back together
McConnell confirmed that he has suffered a broken nose, fractured eye socket and concussion during the alleged assault.
He was pictured visiting a hospital in Dublin to be checked out. 'It still hurts a lot but I am ok,' he said. McConnell said he intends to press charges but was reluctant to talk about the future of his son and soon to be born child.
'Steph and I can never be a couple, but I will always be there for my son. I adore him and want to do all I can for him'
The former Hollyoaks actress was arrested on suspicion of attacking her on-off boyfriend
On Saturday, the day before the alleged attack, Steph had told her 400,000 followers she was planning to let her hair down when her aunt looked after her baby. She later deleted the tweet
Two months ago Davis had talked about having a second child with heavily tattooed McConnell and even talked about marriage. But since they began seeing each other having appeared on Big Brother they have been involved in a stormy relationship.
McConnell has spent time in rehab and Davis has previously spoken about how drink and drugs has affected their relationship
The couple had been staying at the Royal Chace Hotel while Davis filmed Big Brother's Bit On The Side - but has since been axed from the show as their resident relationship expert.
McConnell blamed his girlfriend's violent outburst on drink. Describing the scene inside the hotel room, he said; ' There was blood everywhere and lots of things had been thrown.
'The wooden bedpost had been broken off and that was what she used to hit me. She was drunk and I thought that was wrong as she had just told me she was pregnant.
'I kept asking her to go to the scan, but she wanted to go to the pub and drink. I had two or three drinks and before I left she had the same.'
Other drinkers at the Wetherspoons pub said the pair had spent most of the day boozing.
Black cab driver Roger Osborn, 68, had gone to the pub for a quiet drink with his friends after a long weekend of work.
He said: 'I got here at about 9pm and they were already here and they had had plenty of drink. It looked like he was bullying her and she was shouting at him as well.
'At one point he had a go at us and started swearing at some of the other customers. We didn't get involved. We just wanted to come down to our local and have a drink and we didn't want any trouble.
'He was being aggressive but she was giving it back as well. They were both pretty drunk and they were as bad as each other.'
Mr Osborn said McConnell left for 'about ten minutes' before returning and shouting at a man talking to Davis.
He added: 'Then he left and it wasn't much longer until closing time and she left. He was being a bully and it was getting nasty, but she was shouting back at him as well.
'You just don't want to see or hear that when you want a quiet drink, everyone in the pub was getting angry.' A guest at the hotel witnessed Davis being led away.
Davis has recently appeared on TV with the couple's son Caben-Albi, who was born in January this year
The actress is said to be being held at a London police station and questioned by officers
Steph, who was seen grabbing fast food last month, has had a rocky relationship with Jeremy
'Now I've got Caben!': Stephanie Davis on failed BB romance ban
She told Mail Online: 'Steph was walking away with a woman police officer, being held up because she was stumbling, and he was in a room.
'Hotel staff were bringing ice to him. There was lots of bloody towels and things around. 'She was taken to an ambulance and I think later arrested. It was a terrible thing to see. They are just kids really and had too much alcohol, I think.'
A spokesman for Davis was unavailable for comment.