I had a knee replacement 5 weeks ago. I am getting around and doing the rehab very well. However, I still have a fair amount of pain and I am taking a nonnarcotic pain reliever and celebrex. At night, I go to sleep for an hour or two and then I wake up with knee pain and can't get comfortable or back to sleep. What can I do to stop this problem, my orthopedist is at a loss.