It sort of figures that I'm having a bad pain flare up, after a week and a half where I did push myself kind of harder to draw.
I'm learning my limits not only for my shoulder tendon/etc issue, but going into a stretch where I have a bunch of other "I'm in my Advanced Mid 30's" problems coming on.
I have insurance, so at least I won't be financially put out by any of this, but I do kinda hope once I have more answers, I can somehow get any procedures/etc done in the same stretch of time and then just nap it all away at once.