Hi Alissa,
As far as Mestinon is concerned, you should ask for Timespan, which is a special form of Mestinon with a long action (12 hours or so) and which should allow you to spend a whole night without problem.
For occular MG, if Mestinon doesn't work, the other medication is steroids (prednisone) which could be effective within weeks and the cure could be as short as a few month.
I recently read an paper on the subject, I' ll go get the reference and will post it.
Be patient, keep faith and hope!
Maurice.