Thank you Mike, Abby, Kathie, and 4-eyes for the replies! I appreciate it!
Mainly I am just wondering if the specific walking problem--having to stop and rest a minute after just a very short distance--and then able to walk again though more slowly after a short rest--is that typical of MG??
That is the only problem I am taking up with doctors again. 4-eyes: I have had MS investigated PARTIALLY and was once told I had it, then shuffled off. So I've spent plenty of time on MS forums.

Unfortunately due to my scoliosis they were never able to get spinal fluid out of me and my MRIs have been only nonspecifically "spotty".
The last neuro I saw, 2 years ago, had no interest whatsoever in finding out what was wrong and was half stupid, so I would love to get a GOOD neuro but I don't know yet. First I have to convince my regular (new) doctor that my past workups were NOT sufficient.
Kathie, actually the ghosting that I get after reading (or just from being very tired) does NOT go away when I cover one eye. It's in each eye separately. So it's something weird. I saw eye specialists but no explanation, just glasses, but they do help.
Thanks much for the recommendation to see a neuromuscular specialist at a teaching hospital. There is nothing I would like better! The problem is getting there--and getting believed, when your symptoms are atypical or you have symptoms of possibly more than one problem and have already had some partial workups over a long period of time. Doctors just assume you have a "functional" problem. But I am 56 years old and I have had to think hard about my life recently and I just cannot go on with this stupid unexplained inability to walk more than two blocks--it's idiotic.
Thanks everyone!!