Are you having other symptoms? He is a great primer on Myasthenia Gravis from the Medical News Today Knowledge Center:

http://www.medicalnewstoday.com/articles/179968.php

Often some of the earliest symptoms include double vision, usually late in the day or late in the week. Another symptom is a droopy eye.

We all know how scarey this is. The symptom that prompted me to seek medical help was double vision. I make my living driving a taxicab. I feared loosing my livelihood.

The good new is that MG can be treated. If you do have MG you will find a way to deal with it. By managing the symptoms one can good live.

Be insistent with your doctor to have the Acetylcholine Receptor Antibody blood test.

MG is rare and many doctors are unfamiliar with it. Sometimes doctors do not believe the patient because he or she had not seen the symptoms. Since symptoms present late in the day, and since most doctors' appointments re in the morning, you may not have the symptoms for your doctor to see.

Keep us posted,

-Mark-