Thanks for the replies.
I'm not sure what to think as far as whether doctors are taking me seriously. I really have been given about a million different tests -- blood tests for just about everything, MRI's of the brain, c-spine and t-spine, special dizzy testing to see if it's the result of an inner ear problem, eye nerve conduction test, and various tests for autoimmune stuff. Part of my feeling of "Grr, argg, they aren't taking me seriously enough!" is probably stemming from my frustration of not getting anywhere with this, as much as it is from a feeling that the doctors just order a few tests then sit back and forget about me until my next appointment 2 months later.
So in the absence of anything showing up in the tests, some doctors are telling me it's "all in my head," others are expanding on this and saying it's some kind of deeply repressed anxiety, and some are wisely saying nothing. I realize a lot of my symptoms sound like anxiety...but they sound like a lot of other things, too. When I first went to the ER the night this began the doc told me I had "all the signs of a panic attack except the panic." Which strikes me as a little odd. I know there's this whole thing with "health anxiety" and that it sounds like I have it because I keep stubbornly insisting that something is wrong in spite of tests results. On the other hand, I'm not afraid or constantly worried of whatever it is being really dangerous or fatal...if they tell me I don't have MS or cancer then that's great, I definitely believe it, but whatever is hurting me (however benign it is) is still there and I want them to keep on searching until I feel better. So am I a hypochondriac wasting the doctors' time, or a sick woman bravely fighting a flawed system?
I'm actually seeing someone for Lyme because I was at Crane Beach (evidently notorious for Lyme...?) in MA one week before I (literally overnight) got sick. I figured I tried an antidepressant, so now I should try an antibiotic to be fair, if that makes any sense. No luck yet, if anything it's made me dizzier.
I go to school quite close to where I grew up - so no major relocations or altitude differences. As far as water, heh...when this first started happening the dizziness was much more pronounced in the sun and felt like heat stroke, so I drank ridiculous amounts of water every day for months until I realized it was making no difference. I haven't really changed exercise habits, I'm a lazy engineering student so although I do a lot of walking I don't oficially "work out."
Sorry for the novel-writing here. I think I wrote this as much to straighten out my own thoughts as to reply to anyone else :)