I honestly can't remember when the shoulder pain subsided completely, but it takes quite a while. It's an indication of irritation, so it is probably due to some overdoing it.
Cindy 123 is 11 months post op, and when she has irritation she still gets some shoulder pain. Probably not as severe as what you have in the first few months. Honestly, the healing of this surgery goes on to at least a year. I found I still had some glitches resolve into the second year post op.
I'm sure you could try walking or jogging on the treadmill at this point. I believe most surgeons tell you to listen to your body, and stop when something hurts. If you're lifting weight, that is a different story, and you should check with your surgeon.
I'm sure the wrap is pretty secure at this point in your recovery. Still don't do anything foolish, like lift heavy weight.
Enjoy the holiday season!
Have a lekker day!