Would you say I got an Eating Disorder ?

Yes I would say you do for sure. Please see a doctor and talk to a family member or someone else. This can kill you. Oh and btw Nikko is wrong, it's both psychological and physical. It's called a mental illness (which it is) but it also screws up your body like you wouldn't believe. Oh one more thing, a starvation diet is 900 cal a day, you said some day's you don't go over 300. That is seriously bad for you. Ok I'm done, best wishes!