They told me there would be a 8 month wait for the SFemg. As my symptoms got worse and I started falling, I kept calling the doctor and the SFEMG people. They bumped up my SFEMG to the next month and the doctor put me on mestinon once I started falling. If I were you, I would keep calling, very politely, and tell them about your concern of the progress of your symptoms and that you would take the first cancellation at a moments notice. That worked for me.

Good luck
kathie