Re: head pressure / spaced out feeling
I've had the head pressure daily for 6 years, it's pretty much 24/7 with me. I still have no idea of what precisely is causing it. It seems that light exercise like a 4 mile walk, for example, can help get my mind off it for a while as that seems to raise endorphins. Strenuous exercise, on the other hand, especially anything with heavy lifting, can make it much worse, for me anyhow.
Let us know if you get any further testing done or if you find anything else out about it.