What eating disorder do I have? (If I have one at all)?

[Kendra]

I have extremly low self esteem. sometimes i kinda like my face but not really, overall i just hate the way i look. im about 140lbs and im 5'6. 15 years old. i eat breakfast (6:30 am) because my mom watches me. its usually around 500 calories. then i drink tea at around 8pm and i usually drink 2-3 bottles of water a day. sometimes if im really hungry and dont have water il buy a diet coke at school during lunch. i keep this up through the weekdays but usually on the weekends my parents are home so i eat like 1200 calories a day or if i can escape about 800. i walk around on weekends but its not like im working out. i constantly fidget cuz i heard it burns calories and i try to force myself to take naps so i wont be awake tempted to eat. i try to do exercises at home because im too insecure to go to the gym becuase i think people will be there laughing at how of course im there becuase im fat. wen i eat even a little bit i feel extremly guilty and that im going to get a whole lot fatter just because of it. ive tried on several occasions to make myself throw up but i can only get to gagging. but i do go on binges like once every month. im constantly thinking about food, how i feel like i cud eat forever and how hungry i am. but i also think about how fat i am, how evryones looking at my fat and how much better everything wud be if i were skinny.