I was dx'd with shoulder tendonitis a few years ago, and was sent to PT.  
Fine.  But, after weeks, literally, of PT, and having absolutely zero
improvement, my therapist said that I seriously needed a second opinion.  
So, I got one.

My second opinion dx'd me with adhesive capsulitis, or frozen shoulder.  
It was horrific.  The pain was probably some of the worst I've
experienced ever.  But, once I was properly dx'd, I could start down the
road of recovery.  It was long and grueling, but I have recovered.

Shoulders are really complicated joints, and a proper diagnosis is
absolutely critical, but not always apparent on the first go-round.  
Bonnie, how is your range of motion?  You didn't mention that, and that
is the biggest issue with adhesive capsulitis.  If your range is good,
then you don't have it.  Whatever you have, I sure recommend that you
get your doc, be it a rheumy or orthopod, to prescribe physical therapy.  
If you do not have adhesions, you sure as hell do not want to get them.

Good luck.  Shoulder issues are a real miserable drag.

Personally, if it doesn't require cutting, I ALWAYS go to my
rheumatologist. Indeed, I go there FIRST. If he and the tests indicate
surgery may be necessary, THEN I make an appointment with the surgeon.
The only times I go to the surgeon directly are for followups on things
he's already operated on :-) (excellent work with my hips)

Ari