I had a total knee done. I was in a bad flare at the time. During the recovery I thought I was going to die the pain was so bad. I expected the pain to be better not the same as before the surgery. It took 4 months for the knee to settle down. THEN I felt so much better!
Try not to have your surgery when you are in a flare. I have to have the other one done but I have told the surgeon that we will have to work around my FM and it's flares. I just had a complete shoulder replacement and I knew what to expect this time