Hi Cherry and Welcome to the neighborhood!

You will love it here....lots of wisdom and support can be found here. I'm sorry to say but I haven't experienced any problems with my respiratory with MG.

It does sound like you are having great difficulties breathing and that needs to be checked out before a crisis situation.
Maybe get another opinion with another specialist??

I agree with Annie, has your doc recommended IVIGG yet? It could offer you some relief. If not, you need to inquire about it.

Take care
JJ