had frozen shoulder (right side) a few years back before I had a diagnosis for Lyme/Bart. It was terribly painful and made everyday life so challenging. One dr said "just do some exercises and it will get better and it might take a year". I decided to see a PT - what a difference! He had me doing a variety of strength and stretching exercises and it was completely resolved within 2 1/2 months. If you have access to a PT, I would try and see them -if nothing else for a list of exercises etc. My experience with most dr's is that they don't know much about
much .... including physical therapy. I couldn't use my arm at all - and after 2 1/2 months it was back 100% normal.
Good luck to you.