Glad to hear you got a diagnose. That is the first step to progress. I also went to Dr. Thompson and he is a wonderful doctor and has a wonderful staff. From experience, it seems very obvious to him if there is pec involvement. On me he palpated the pec area, and the pec was very obviously pulling the shoulder forward. Dr. Thompson said when he cliped the pec minor muscle during surgery, my shoulder immediately released some of the tension.

Hope you have some luck with the PT, and if nothing else you will get some of the muscles stronger for postop recovery. You unfortunately will prob be out 2 to 3 months. I am a loan secretary (very sedetary job) and I was unable to go back to work for 10 weeks, but did have some long thoracic nerve issues so was unable to lift my arm enough to type very well.

Praying for you, and if you ever have any questions feel free to pm me