When will the shoulder pain go away?

I had my gall bladder removed on 05/19/09, when I woke up from surgery I was in so much pain that I couldn't take deep breaths cuz of the pain. Now I feel a lot better, I can take deep breaths just that my stomach area feels a lil sore but everytime I get up to go to bathroom or change position I have a sharp pain on my right shoulder. It seems like the only way for the shoulder pain to go away is if I stay still. Does anyone know what can be causing this pain and when will that pain go away?