Nadia Essex has been hospitalised over fears for her mental health.
The former "Celebs Go Dating" star said she had reached out for help after another spat with her former co-star Eden Blackman, who she had targeted with cruel anonymous messages on Twitter.
This week he called Nadia "calculated, toxic and stupid" and she said the "attack" had led her to seek help.
Nadia tweeted: "The attack was 2much to cope with.
"I was taken to hospital for my mental health. Being called toxic, Stupid & calculated made me feel the world would be better off without me.
"Having a barrage of abuse just as I was feeling happy again devastated me. Thankgod for our NHS!"
Nadia recently admitted she suffered from "suicidal thoughts" since she departed "Celebs Go Dating".
The 36-year-old relationship expert resigned from the E4 show after it was revealed she had been suspended for using fake online accounts to troll people, and she has since been urged to end her life by online bullies, and branded the "most hated woman in Britain".
She said: "I have had suicidal thoughts from the mountain of abuse I have received. I've been told to kill myself.
"Looking back on it now, I didn't deal with it in the right way, I know that. I've been called a fat ugly b***h on a daily basis. I've been told to kill myself. I've been told I am the most hated woman in Britain."
Nadia says she only made up the fake profiles because she had been told not to speak out publicly over allegations her fellow "Celebs Go Dating" co-star Blackman had been cheating on his girlfriend.
She said: "After it came out about Eden's cheating I needed to vent. I wasn't allowed to speak out as myself because I was warned to keep quiet.
"I felt like I wasn't allowed my freedom of speech and was told not to put out a public statement. I was in completely the wrong head space. I was a mess. I couldn't leave the house because I was terrified people would hurl abuse at me in the street.
"People were so angry I wasn't condemning Eden's cheating that I was getting abused online constantly.
"I felt like I couldn't speak up. It was humiliating. I was devastated and petrified and I didn't know what to do. I was depressed and I felt desperate. I am at rock bottom."
Nadia also claims Eden used to make "passive aggressive digs" at her on the set, and "couldn't even sit next to me".
She added: "I feel like he hated me and he made sure I knew that."