^Aura migraine, can be with or without pain. I get weird symptoms with my aura migraines, too. I only figured out how to describe it the other day on another forum - I'll see common everyday items (say my couch) but not recognize them, it's that sort of "what the heck is this doing here?" feeling you might get if you came home and there was a strange car in your driveway. You know it's a car, and even what model of car - but it shouldn't be there.
I grew up in a family that has migraines, so at least I knew what was happening, even during my very first one at age 10. I can imagine it would be frightening for someone who doesn't have any experience with them, worse when you get bad treatment in the ER.
One theory is that the initial aura is caused by localized ischemia in the brain (constriction to vessels cutting off blood and oxygen), which is what causes the weird neurological symptoms during the aura.
I have issues with postural hypotension, which often causes my brain not to get enough blood and oxygen - thus resulting in what would be neurological symptoms, a big one being "brain fog".
I'm sure that would throw off a regular ER doc.
The chest x-ray could have just been sort of a routine thing as heart problems and infection can cause neurological issues, too. If your neurological symptoms are bad enough or last longer then 30-60 minutes you may want to look up information on transient ischemic attacks and of course look for a very good neurologist near you if you can.
It's unfortunate that we're at the doctors' mercy to get any treatment at all. I think it gives some an inflated ego that makes them think they can get away with verbally abusing their patients.