Re: Worried about BRAIN TUMOR...HELP!
I think it is most likely your anexiety. The tests your doctor did are neurological test which would show disruption in the brain.
Some people (me) are sensitive to headsets. I cannot use them as they do cause pretty nasty tension headaches.
As for the nausea, that too is normal. There can be many issues that can cause transient nausea and dizziness. The most common is mild inflammation of the eustacian tube, due to low grade ear infection, allergies, sinusitis etc. Although anxiety can do the same.
As long as your neuro exam was fine, and the symptoms are mild try not to stress.