In reply to Tigger:
Mike
I suffered the exact same injury at the wall at the end of March.
Went to physio first, who advised resting it and eventually put me in for mri scan (NHS, end of June).
After a couple of weeks, my scapula started sticking out. Went to GP. Got sent for 'urgent' (took 3 weeks) ultrasound.
Doctor put me in for mri that day.
Diagnosis turned out to metastatic tumour, eventually traced to pancreatic cancer.
Don't want to alarm you, but I would strongly advise you to see GP too.
I had no other symptoms.
Best wishes.
Post edited at 19:21