Hurt back please help?

i was on the school trampolines in p.e i'm in year 11. as i went down to a seat drop i was really high up as we have these super bouncy trampolines but im the only one that flies really high. was i went down i landed then went to a back drop. as i did my back crunched the bottom went all hot and felt like it was going over something it made me feel really sick and i still kinda do. it aches all over a bit and there like a hurtty felling as well but i can move just somethings it hurts to do like bend right down what do u think i have done? x