Okay So I Went To A Dance It Finished At

Okay so I went to a dance it finished at 10:30 and the last song was pop, lock, and drop it and so when it said drop it over and over, I constantly when down into a very low sqat position and immediately after I was done I could barely walk. And I still can't walk very good. Right above my left knee is where it is hurting very badly. I have taken ibprophen and iced it, what can I do to make it feel better? I have to cheer tomorrow.