Bob, it might be a good idea for you to identify http://www.myasthenia.org/ a local chapter and a support group. Give them a call. They'll tell you which neurologists in your area actually specialize in MG.

Also make an appointment with a pulmonologist for a pulmonary function test and a sleep study. In the meantime invest in a $50 oximeter so you can monitor your O2 levels especially upon awakening. Keep a log of the readings for the pulmonologist.

Good wishes.