Hey WW. I don't have any experience with cats whatsoever, but I just wanted to say that I hope she feels better soon. I have an epileptic dog and I know how stressful the seizures, confusing vet visits, and worrying can be! Hopefully you find something out soon. I don't know if you live in a big town, but is there another vet office that you can visit? We had to search around for a while before we found someone we were comfortable with and trusted with our dog, Keely. It's worth the money for a consultation if you can find someone you feel actually cares about your animal.
Good luck & I'll say a prayer for you & Beade!
"Happiness is a warm puppy."