Hey there,
Like the other members have said above,
You would need a professional to diagnose you. But according to what i know you are doing disordered eating. It could turn into an eating disorder if it meets the standards in the diagnosis. It would probably go under Bulimia, which involves binging (compulsive eating until it hurts and can't control it) and then purging (self-induced vomiting, starving, over-exercising, taking laxatives or diuretics etc to get rid of the food you consumed). I say that you should talk to someone you trust and seek help because it is important.
I wish you all the best. You are very strong for reaching out and speaking about this.
If you need anything or just want to talk you can message me
You don't deserve to be bullied even if what the bullies are saying seem true in your head. Bullying is wrong end of discussion
And remember beauty comes in all shapes and sizes.