Thanks, @themagus - it went well, and while I'm not any closer to finding out what it is, I can cross one more scary thing (Parkinson's) off the list, and have a next step (rheumatologist) in place. And thanks for all the crossing... LOL!
And no worries about the voting thing - I hadn't actually noticed, and have zero expectations of a vote from you (unless, wait - do I have some juicy blackmail on you? makes mental note to check her secret files) but I do appreciate you shouting out. 😊