The current Sky Sports pundit was caught on camera spitting at a car, which contained a 14-year-old girl, in March 2018.
He said: “Coming home from Old Trafford and then when I lost my job at Sky – I’m someone who’s quite on the front foot, if someone attacks me.
“But that knocked me for six months. For a good six months I wasn’t myself. I’d get up in the morning and just have that pain in my stomach, oh that did happen.
“I went to see Steve Peters [a psychologist] after it. I felt really bad, embarrassed, my family, my mum or dad. And the kids.
“I remember getting back to the house that night when I’d been at Sky. I haven’t seen the kids, they’re at school, and you just get back and we all sat together and it was tough.
“Even though we’re in the public eye, we’re not the royals, Beckham, big stars. You read them on the front page. When it’s you, everywhere I went it felt like people were looking at me.”
Carragher was suspended by Sky Sports following the incident and didn’t resume his role for the broadcaster for five months.
The former England defender has since rebuild his media career, recognised today as one of the best pundits in the game.
Carragher added: “It’d come back to me, but it was done. I owned it. I didn’t blame anyone else. I accepted it. I took my medicine.
“Whatever s*** is thrown at me I’ll take it. And that’s the way I was as a player.”
Carragher was widely condemned for his actions but apologised shortly after the incident during a live television appearance.
Speaking in March 2018, he said: “Watching those clips back it feels like an out of body thing – just that moment of madness for four or five seconds.
“My biggest regret is for the 14-year-old girl to be caught in the middle of it. That devastates me more than anything.
“I have a young daughter exactly the same age and if somebody had done that it’s difficult for me to find the words to how I would react.”
Despite being rivals during their playing days, Neville has since become close friends with Carragher and asked Sky Sports not to sack him.
He tweeted: “No excuses he’s made a big mistake. He’s massively passionate about football and he’s overstepped the mark and shouldn’t have reacted.
“I’ve been on TV for three years with him and in my opinion this isolated incident shouldn’t stop us working together.”