Annie,
Thanks so much for your concern. Believe me, the ER crossed my mind more than once.
I felt fine all day yesterday, in fact almost normal. I took some thyroid meds this morning since I had been off it for two days. I have had some weakness, but not profound like before, and no major twitching. But I definitely feel that the thyroid meds are making me worse.
If I start to get back like I was before, I will definitely get attention.
I live in a very rural area, though, and if I call 911 they will come and take me to "Hooterville Hospital", which would probably worse than no care at all. If I go to the hospital of my choice, where I would get better care, I would have to drive myself because I am here alone due to the holiday weekend and everyone off on their own adventures. Don't worry, though. If I get feeling awful like I did the other day, I will definitely call someone to come get me.

Since I was feeling so good yesterday, I had big plans of doing all sorts of things today. I went to Walmart to get a few things I needed for my big plans. It was hot in the garden area and that made me feel weaker, so I got out of there and back into A/C which helped. I got myself home and in the house and my things are still in the car. But that has been my life for a while now. Even before I had even heard of MG or its symptoms, I have had to adapt to my fluctuating weakness and intolerance of heat.
I promise to be very careful till I go back to the doctor this week. Again, thank you for your concern.