How do i handle this?

i'm 14 and yesterday at school when we had to tell each of our cl members our names (early school year type activities) i got a big *****. it was really bad because i just had PE and i was wearing my bball shorts and everyone could see and was making fun of me. i don't want to go to school now because everyones teasing me, even on FACEBOOK!! they call me stuff like joewiener and "is your joe popping out". this is my first year in highschool and at a public school with LOTS of kids. what do i do???? please help