Beginning signs of an eating disorder??? serious answers only pls?

I feel as if im on the brink of developing an eating disorder and have felt that way for over a year now. I suffer from depression/anxiety and Self-injury and have for a very long time. I used to be confident in myself and I know I am a very thin person. I weigh about 98 lbs and am 4'11". Almost everyday now I get upset about my body and I think I am getting fat. I get so discouraged about how ive gained weight in certain areas and just am not comfortable with my body anymore. Until recently i was in a relationship with a guy for over 4 yrs who was very health conscious. He would make me eat healthy and if I ate bad food he would actually get mad at me and tell me I better work out if I'm going to eat like that. At one point I worked out 6 days a week (i dont anymore). I never used to care to much. We are not together anymore but subconsiously I think about the foods I'm eating and what I should or shouldn't be have. I think I will get fat if I eat that or I should work out . Sometimes I'm not in the mood to eat or I just honestly forget to eat. Now im having thoughts of actually purposely stop eating. I'm afraid of developing a disorder. I don't want to have one. I don't know who to go to, I'm afraid to tell anyone. I want to tell my boyfriend but I feel bad b/c he already is helping me cope with all the other stuff and I don't want to overwehlm him with my problems. What do you think? Am I over reacting? Is this normal? btw I am 22. thanks.