I had a total reverse shoulder replacement last September. I did find that during physical therapy new exercises would ramp up the pain somewhat. Just listen to your body and rest whenever you feel you need to so you can get through the day. I did great during therapy and got released early. Then in May I broke the shoulder in a fall. I'm still being seen by the ortho. This was my left shoulder. Now, I get to address my right shoulder, which is actually in worse shape. The actual surgery was brutal (so much worse than natural childbirth) and I decided to put off the right shoulder until absolutely necessary. I wish you all the best in your recovery. I will add, though, the doctors aren't very keen on writing scripts for pain meds.