all tests negative

anyone clinically diagnosed? all tests negative? i had a dramatic improvement with mestinon n GP suspects myasthenia tho was diagnosed with periodic paralysis last year and i improved a lot on just diamox and K

but am worse now, with new symptoms.breathing, jaws weak

the neuro told me my neck isn't weak cos i can hold my neck up,if it were truly weak it would fall. mom said it did so during episodes and we dont want it to go that bad!