Buckley,

While you are waiting for your Wikipedia reference-linkMRI and also appointment, are you doing any strengthening work for your Wikipedia reference-linkrotator cuff muscles? Has the physio checked for posterior capsule tightness and also scapulohumeral rhythm? Please remember that regardless of the MRI or appointment you will need to fixed the stuctures that have been effected by the actual injury. So make sure that you get as strong as you can (safely and non aggravating). The MRI will give you a strcture but you may need help eg. CSInjection to help settle the pain to allow you to strengthen.

Enjoy

Konrad