The easiest way to go about any new symptom is to see an internist. Or someone at urgent care instead of the ER. Do you have urgent care centers? They have a lot of the same capabilities of an ER, if it's not a true emergency. Does your insurance company have a nurse line you can ask about it?
Don't rely so much on your neuro. They are a specialist and often only like to deal with their specialty.

Internists are great for figuring new things out . . . usually.
I just hope you'll feel better.
Annie