Hello Warblesnap and Welcome to NT. I have been on vacation, so it's nice to meet you. I agree w/Idealist in that the spasms could be an FM sx. I have some other neurological things going on, but have had an FM dx for quite some time. I also have Polymyalgia.

Sometimes my legs will spasm and then immediately go into a muscle cramp. It hurts like the dickens and will only go away if I massage the area right away. Heat makes my legs just give way and I'm not sure if it's the FM or another problem, but I seem to end up on the ground when I get overheated. So, be careful walking w/those muscle spasms.

Let us know how your Dr appt went and again~~ welcome.