Im probably Anorexia

So I think I might be Anorexia. I've been getting called fat my whole life got kinda used to it then I got with a few of my exs it got worse they said the reason they broke up with me was because I was fat. I've been eating maybe 1 ever 2 or so days and it's nothing big about the same about you give to a child. Then I spend 3 hours at the gym. I want to get better I just don't know where to start.