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Dang. That's how I did mine as well. A few times. I wish I hadn't waited so long to get treatment, though, but was thoroughly over rehab and all that after the big accident the year before ... Anyways, I since learnt that longer term inflammation weakens the tissue more. So getting a course of anti inflammatory meds or an injection earlier might have prevented some of the damage I did by landing on it when it was already throbbing every night. For me it's torn three rotator cuffs and a partially ripped bicep tendon plus a labrum tear ...
Of course YMMV
Frozen shoulder? Cortisone injection really helped me.