Is there a buzzword or single word for this symptom...

It's like "head nausea" or a "hyper-sensitive gag reflex".
It's a general un-well feeling or tension in the nasal/ throat/ ear area that leads to dry-heaving or retching.
I don't want to call it "nausea" because it truly has nothing to do with the stomach.
It originates completely in the head area.
There's no vomiting involved and the stomach never really hurts.

I explained it to my neuro as "nausea" and he prescribed me Reglan...which seems to be a medication that deals more with the stomach. Again, there's really no stomach issue here, just retching.