I think i have mental problems?

well you see, i dont realy have an eating disorder but it pains me to go over 100 pounds im 12 and 96 currently, but i just keep thinking just 4 more pounds....i checked my bmi and it was 17. but i couldnt help putting in a feww mor 9's and making it morbedly obese i just feel dizzy and plese donnt yell at me. but i just look up 100 worst foods and stuff...plese help me bbefore i kill myself...I DONT WANNA GAIN ANYTHING!!