I've said it before and I'll scream it again:
ACUPUNCTURE!!!
I have been able to make big improvements since I started a year and a half ago.
I can raise my arm over my head. I can exercise doing forward and backward arm circles. I can do cheat push-up (I don't put my hands flat on the floor because my hands don't have that range of motion yet... I do them with fists.) Being able to get a range o fmotion has helped me develop the muscles and do the PT I wasn't able to do when I was super inflamed. Acupuncture minimizes inflammation

Also, I have to say changing to a different bra style helped me too. Before I didn't have enough support and the girls were pulling me forward. Now that they are hoisted up, I don't turtle head as much or get upper chest muscle soreness.