i was diagnosed over a year ago with MG. i was constantly exhausted to the point where i had to quit medical internship for it... but now it got me thinking, do i really have MG or it's just plain ADD. I'm seeking some form of clarity... anyone???

Did they do the Tensilon test? That is definitive for Myasthenia Gravis. They remove the thymus gland as part of the treatment. It would be easy to recheck you for MG.