Susan, That's a good question.
Whenever I've been in doubt, a doctor has run a thyroid panel, chemistry to see if electrolytes are off, CBC, etc. It's always good to rule out other stuff, which is what the urgent care doc did before he sent me off to the hospital right before my MG tanked.
Could you be getting sick?
You don't have any buckthorn plants around, do you? They can cause paralysis in patients with MG.
You could be improving but don't let that fool you!

I've experienced times when my MG is "fine" but then others like right now where it flares with the littlest thing I do.
I'm glad you're talking to your doc on Monday. Please mention doing some basic tests to make sure nothing else is going on!
Annie