Everything will be alright, Pokey, as long as you're a person who
Wants answers. I am like you and would rather know what I'm up against so I can get the right tools in my arsenal to fight it.
However, I used to work for a radiologist who said he'd rather
Not know! Go figure!
Sometimes a little anger can be a good thing. Perhaps the Neuro will sense that you need to be taken seriously (unlike your PCP). I hope you get a good one (I finally did--3rd one is a charm!)
Let us know how it goes, k?