tom mine went undiagnosed/misdignosed for over 2 years. the swollen appearance of my eyelids led to dx's of allergies and blepharitis. do you have problems with glare? almost a white out when looking toward the sun or a bright light source? you can have the antibody blood tests. they're expensive, 3X$200 ea.. you can do them one at a time in order of priority if you can't afford all at once. for ins. purposes, the suspicion of mg should be enough to justify at least an exam by a neurologist.
BTW, mine was finally recognized when additional symptoms presented during an especially bad bout of the flu. the flu symptoms went away but the mg symptoms did not. i understand this is common. the rarity of the disease coupled with remissions (i had many over 2 years) makes dx problematic.
the sensitivity to fluorescent light is very suspicious. i noticedthis early on, i'm a sign and lighting contractor. i spend a large part of my waking hours looking at very bright h.o. fluorescents. it was maddening. the white out thing too, driving at sunset was an adventure.