Wow, "a few" doctors that treat MG. Please be sure that the doctor that you choose to see the most has more than one or two MG patients. The very best you can do is to get one who specializes exclusively in MG, next best is a neuromuscular specialist.
It's great that your testing is moving along so swiftly, most people do not have that kind of experience. The people here are wonderful, you'll get lots of support and info.