Kathie, Has anyone gotten back to you? Are you still this bad?
I cannot believe the ER didn't so other testing. If they were so "amazed" at how weak your upper body was, why didn't they admit you for observation and oxygen at the very least? They could've checked your oximetry while you were sleeping to see if you're getting enough oxygen.
I haven't had plasma but others have. It's not a simple procedure and you should make sure they know what they're doing and that they've helped other MG patients before!
Anyway, I hope you are getting more help. You sound like you're on the verge of a full blown crisis. Take care.
Annie