PM Dr's can basically give you back some quality of life. If you find a good one, they will do whatever is necessary to make you hurt less. They can't always make it go completely away, but when the pain is lower, you may feel more like getting out.
I wonder about
all the PT, though...it seems that you may be aggrivating your shoulder more sometimes. It's just a thought and I'm certainly no Dr.
I wish you all the best!