Have you checked out this clinic in Minnesota?? http://www.minneapolisclinic.com/

My question is simple. If they learn something, what can they do to treat it?

Many concussion diagnostic tests are of little value because there is nothing that can be done to treat the abnormality discovered.

I spent $18,000 out of pocket in various diagnostic tests and treatments and found the only useful treatment was the myofacial release done by my physical therapist.

Have you sought out a PT or other therapist who can try the Epley Maneuver or similar therapy? Maybe you should just jump to the treatment and see if it helps.

Have you tried consuming ginger? It is good for motion caused nausea.