I Was Wondering What's Wrong With Me? I Think I

I was wondering what's wrong with me? I think I have some type of eating disorder but I'm not sure. Starting a few years ago I got really upset over my weight and I managed to lose 25 pounds. Now, I'm still upset over it. most times I barely get hungry and I just ate a small amount of pizza and now my stomach burns and I'm not sure if that's related to an eating disorder or if my stomach has something wrong with it or if my anxiety is just acting up? I have no insurance and I can't afford to go to the doctors to find out.