That almost sounds like food poisoning to me. I've gotten pretty woozy and some nausea if I don't take my morning dose of 30 mg mestinon with food. Makes for a fun drive to work I don't want to discount what happened at all, but perhaps it's something ordinary like a food reaction, perhaps it's just needing to eat with the meds. Could be you don't tolerate the mestinon too. Mestinon leaves the system pretty quickly, thus the need for being on a dose every 3-4 hours for most who take it.

Is it possible your primary's office could take care of the referral for you even though your doc is on maternity leave? This is not a trial you want to do without supervision!

Wish I could be of more help, just trying to throw a few ideas out there. Best wishes!