How to treat a sore leg & a sore neck?

Well I'm in cheer & tumbling and yesterday I had class and woah did i work my butt off! So after the class, none of my body hurted or at night then i went to sleep and when i woke up DAMN, my neck & leg & part of my back is sore. How can i treat this FAST cause i have class in 3 days! HELP