Pixie, don't know if it is the same or not, but I had similar symptoms (not the queasy, but the others). I eventually ended up at a neurologist and he suspects it is an inner ear problem. I was on medicine for quite a while. Like you, I felt like eating would make it better, but that wasn't the case. I'm finally off the meds and doing "vestibular rehab." You may want to Google "BPPV" to see if that seems to describe any of what you are feeling.
"If you drop an egg, you don't say, 'Oh, shoot' and drop the other 11, do you?"
-Source unknown, but obviously brilliant
Reached goal 4/16/2010...but kind of afraid to look these days