type in "dislocated shoulder" on google that will get into details. It never happened to me but I've had friend who plays Hockey, and assistant coach just popped it back in. That must feel wierd dude, if there's anything then I'd take it easy, just in case you did something more to your shoulder.

How's it feel, is it tensed? Can you relax it? If you feel any pain, or soreness just take it easy.