I too had all the MG symptoms but all labs and that horrible muscle function test came back normal. At least your Neurologist didn't want to send you to a Physch doctor. After getting a second opinion from the Chief of Neurology that diagnosed me with exam and then the Tensilon test. He started a treatment plan that is giving me much improvement. Ask your Neurologist about Tensilon. It's an injection given IV in the emergency dept. it took about 5 mins for my strength to come back and 15 mins for it all to go away again. I tried Mestinon with no results. Keep us posted. I really hope they figure this out for you.