Definitely listen to your PT hopefully you have a PT that has worked with athletes. There is a difference. I am in PT right now and it is amazing what I have learned and been able to put into practice in a very short period of time.
The diesel crew shoulder rehab - prehab stuff is incredible. I actually got my PT doing some of the exercises from it.
What we think, or what we know, or what we believe, is in the end, of little consequence. The only thing of consequence is what we do. -John Ruskin