Though x-rays indicate OA, given your symptoms as being entire right upper quadrant pain, I would not have as my therapy diagnosis for you “OA”. It would not surprise me that you were referred to therapy for OA, or carpal tunnel, or tennis elbow, or cubital tunnel or shoulder impingement. Even though diagnosed and referred by an MD, doesn’t mean any of these explain your pain. Pursue your therapy appointment, and try to make sure you have an experienced therapist. If referred to physical therapy, ask if the clinic has a therapist with manual therapy skills.
Please review my articles:
http://hubpages.com/hub/Computer-Ergonomics-Quick-Relief-Tips
http://hubpages.com/hub/Arthritis-Pain-Guide-to-Relief
Good luck!