HELP I FELT MY SHOULDER DISLOCATE!!!?

Ok well I was in P.E and we were playing badminton. Everting was going fine with my friends and stuff. Then when we were playing, I decided to do a big hard hit and then I felt my bone move like dislocate and went back in. I fell to the floor in pain and then my shoulder was hurting a lot for a few minutes. So then I take a break but I still feel a little pain. It's been 8 hours now I feel some pain when I do movements with my shoulder. Help and please I don't want you to just say go see a doctor. I'm asking. Please help how long should I wait to see a doctor, what can I do, what is thing please any help would be great!!!!!