LOL--I did the SAME thing so many years ago. Darn near killed myself, too! One day, as I sat on my front porch feeling miserable, my husband brought me the phone. On it was my NEURO---

I thought I would soil myself! He however, was just concerned that he hadn't heard from me, and there was never any blaming, or lectures.
I'm sure you will be fine. Just go in and explain what's happening. Since you just take mestinon, there is no reason to even mention your transgressions as it is not in any way an immune modulating drug. Just tell him your current protocol "isn't cutting it!"
Don't worry so much! It will all be fine!
Happy New Year.
Missy