I think I can reassure you that your PT did not mess up the joint - the pain would be quite different to what you describe.

Please don't abandon your PT - it is one of the most important components of a successful outcome. Just try to accurately describe the sensations and work with the therapist to modify the exercises so they are challenging (even uncomfortable) but not causing sharp pain.

Please let me know how you are doing in a few days - and remember, ice is still your friend, especially when you are uncomfortable or have finished your exercises!
Sue