Oh no, I feel horrible for you!! I went on with vertigo in my life since around March of 2008 - I suddenly started experiencing vertigo that was horrible to deal with daily. I was taking serc, but it only helped a little bit. Upon going on our trip in September, I knew one of 3 things would happen - either 1.) It would get worse. 2.) It would stay the same, or 3.) It would get better.
Believe it or not, despite the sensation of the ground moving up and down for a long time after exiting rides (I went on CS a couple of times during our 5 day pass, and other rides, too, with motion), somehow, during those days, and upon our return home, I have been feeling sooooo much better. I have to wonder if it was the airplane ride for several hours there and back that helped (I used earplanes by the way, to help alleviate pressure in my ears from flying, as well, I took a sudafed prior to the flight), or was it my cold that I got on the 2nd day there (I had to take sudafed for the rest of the week), or was it the humidity and temp. change from our dry, cooler Alberta. My real question though, is... DID the rides - the G-forces, etc. help for me to overcome that?
I HOPE you start feeling better soon- it is such a horrible sensation to move your head and feel vertigo. I always felt low grade nausea, too.
Also - hormonal changes can trigger if it's going to be worse or not.
Do you have TMJ, or arthritis in the jaw? I have TMJ, and think that my vertigo is pegged mostly to that.
GOOD LUCK!!!! I am glad you will go have it checked out, and please post back here when you do, to let us know how you're doing.