I had my gallbladder out in May of 2001, and I was pain free in about a week and fully recovered in about 1 month.I would suggest seeing a doctor. Do you have a fever? you could have an infection.
I also had my GB removed recently (12/27). Just two days ago I was able to sleep on my stomach again. I am also a stomach sleeper, so it was a pain for me too! The incisions will be tender for a little bit yet, but I would also suggest contacting your doctor, just to be safe. Good luck!