I ran into the guy who organizes special classes at the gym. He asked me where I'd been at jujutsu (he's in that class), and let me know that another session is starting this weekend. He said something to the effect of "Oh, well, another session is starting this weekend, but if you've got a shoulder thing...".
I'm feeling kind of down about the state of my body (not just my shoulder), and kind of down in general.