I spent about 2 or 3 hours too many shooting around on the basketball court on saturday. Now I'm experiencing pain in my upper back, near my left shoulder blade. I cant do much moving around in or out of bed without experiencing any pain. I've found that if I bend my left arm behind my back , as if I was rubbing my back with my left hand, I can move around with little to no pain at all. My question is what can I do to treat my pain, without seeing a doc, if possible.