Thanks for your answers.

I agree with you that stress makes i worse.

I have an appointment with my neuro next week so i will ask her about thymectomy then.

Anyone else here that have been diagnosed with SFEMG test?

I am seronegative and EMG in my arm and leg muscles looked ok.
I also have no other muscle problems than difficulty swallowing.
They did a SFEMG on the musles around my mouth and told me that it was MG after that.

I have tried Mestinone now for a few weeks with no luck.
My neuro now wants me to start with prednisone 30mg/day.