Body image problems whats wrong with me ?

I had a boyfriend a couple of months ago and he made a comment to me that my Body disgusts him and that I am too skinny . I took that comment and starved myself for months and was never cot eating in public because I was too scared of what other people saw me put in my mouth. My mom noticed that I went from 121 to 101 in one month and made me stop . A month after I stopped she made a comment that I looked chubby / fat in my bathing suit . She may have not ment it in that way but I took another comment and started to make myself throw up . Now I look at myself and think who am I and why do I look this way. I am currently taking ablify and seroquil could they cause this ? When I throw up I get this sharp shooting pain in my chest is this normal ?