In reply to Flinticus:
I have had a variety of shoulder injuries that are not rotator cuff problems. Of course they may or may not have been the same aa yours. But a sports physiotherapist should easily be able to help you in one session, as long as you then do the exercises! And if they say do it three times a day, go for gold and do it 10 times a day. Not sure a chiro is an optimal choice here....
Out of interest, are you restricted with moving your left hand behind your back up between your shoulder blades? Tuck your elbow into your hip, bend your elbow 90 degrees, jeep elbow in at hip and pull your left foream to the right against resistance e.g. a door frame, is this pretty painful?
Post edited at 16:05