I'm a dancer and i hurt my back during a class and i'm also a full time college student. it hurts to walk, bend, arch, dance, and breathe. ?

Sounds like: muscle spasm, but it could be herniated disc. If it does not improve, get to an orthopedic or back surgeon. In the meantime, rest, try otc ibuprofen or naprosyn, (naproxen) and alternating heat and cold packs. If you get pain radiation down your legs, weakness, numbness, or experience bowel or bladder problems, you need to go to the emergency room.