You know why he said that, right? Whenever they see any kind of emotional (or what they might think is hysterical) reaction to something that other patients are fine with, they think the patient has psychological issues ONLY.
And once they plant those stubborn feet into the ground, they don't normally budge. Not only that, but they will belittle any other evidence another doctor has found. Sucks, but true.
You should've offered up some Mestinon to the doctor.
It is NOT benign or anyone could buy it at a store. And any "placebo" effect would be accompanied by all of the cholinergic overdose symptoms, aka SLUDGE syndrome.
http://en.wikipedia.org/wiki/SLUDGE_syndrome
Say the patient is fine.
Laugh at the patient.
Underestimate the severity of symptoms.
Don't do anything; it's legally safer that way.
Give the patient false hope and then snatch the medication away.
Exit quickly and pass the buck to another doctor.
I have no idea what you should do next. Only you can decide that with your primary doctor. If you go the "boss" route, you'll just be red flagged or blacklisted. Use as much "sugar" as you can to get someone to help you!
I'm really sorry you're left without a solid answer. No patient should be left in that situation!!!

Annie