hi, sorry you are having such a tough time. it's scary to be so sleepy- i don't have the gravis disease, have been told i have fibromyalgia but moreover suffer from ehlers danlos syndrome, tethered cord and cranio-cervical instabilty with POTS. The instability in the cervical portion of the neck causes me to have the symptoms you are talking about, although I don't sleep all day- I often become very drugged like and can't keep my eyes open - choke on food too, to the point of having a vomiting problem on and off- these are symptoms of compression of the brainstem for me. I just thought I'd share. It sounds like you are still in the middle of trying to find the right diagnosis for your problems and I hope you find it soon. Knowledge does empower us- so I wish you the best.