Sounds like either Migraine Associated Vertigo (nope, dont need headaches to get this diagnosis) or Mal de Debarquement Syndrome. I have both, and for me, the MAV means tension headaches, episodic spin attacks, and head fullness. The mdds came on a few years later spontaneously (didnt get it after a motion event), but PROBABLY as a result of mav. Experts often see a strong connection between the two disorders. Mdds to me is the constant disequilibrium while stationary, and getting relief doing things like driving. Sorry, not trying to diagnose you, but just wanted to share my all too familiar experience and to say you definitely dont sound like a Menieres case (or any inner ear case)! Like the other poster said, anxiety is my main trigger for this mess.