Upper Back - Sharp Pain

This AM I woke with an almost a stabbing pain in my upper back (right side). This was after two day’s off - pretty much killed my normal AM workout.

I can’t exactly pinpoint what muscle it is - bottom of Infraspinatus, or the Teres minor / major. I did do deadlifts three days ago, but haven’t had any pain until this morning. It has hurt badly all day… Any ideas about this pain?

My normal backwork includes deadlifts, rows, and pull-ups / chin-ups. I usually alternate between DL’s with chin-ups, and rows with pull-ups. Never had any issues before though.

Maybe I drank too much this weekend…