My antibody test was also negative which was done while I was in the hospital with moderate left side ptosis, diplopia, weakness to the point that i couldn't get up without someone around because i was so weak... but MG was ruled out. My neuro already had me diagnosed with peripheral neuropathy after positive nerve conduction studies.

I was referred to a neuro-opthomalogist who made the diagnosis with mestinon a couple of weeks ago.

Fortunately my CT is negative... So no surgery at this time!!!

I am now on ER Mestinon twice a day and the short acting for break through as needed.

Good luck, don't give up! I have fought these symptoms on and off for over 5 years and thugh it absolutely sucks to have this diagnosis, but at least I now know what I am fighting!!!
Lindsay