How do i stop pooping at school?

Lemme get things straight number 1 I DONT DRINK COFFEE I DONT EAT AT NIGHT I WAKE UP EARLY TO TRY I try anything you can think of i woke up early before early everythinh i tried but for some reason whenever i touch school campus i have to go poop im not racist im black but the kids at my school are really ghetto and they do things like gamble etc i poop in the bathroom EVERYDAY i havent missed a day ever since AUGUST 25 which was when school started i always have to go WHY..!!! They make fun of me but i ignore it and i try my best not to go but this situation cause me to be late miss school etc. But can someone please help me