The Next Day After Having My Gall Bladder Removed, I

The next day after having my gall bladder removed, I had the most awful pain in my shoulder, couldn't move without crying with the pain. Went back to hospital and was told it was trapped gas and that excersises were the best thing to move it. Am now about to have a total knee replacement, second one to follow at a later date and am terrified of the same thing happening again, I'd rather have another baby than have that awful pain!!!