Guys, thanks for your support. bob4432, you've been a real inspiration to me. I sincerely thank you guys. I know this is a computer forum, and I feel like an idiot posting all this stuff, but it's helping and I feel I'm getting close to finding out what's wrong with me (probably just a week or so away -- after I get the MRI). So here's what I'm thinking.
Today: I have a new regular doc appointment to replace the guy who's giving up on me. I'm thinking I should go in and get tested for heavy metals, just in case, like you guys said.
End of this week: Will get contacted by the neurologist in regards to the (3) MRIs (head, 2x spine). I think I should probably cancel these, because of info below/money
Monday of next week (off work): Have a (1) head MRI scheduled in my hometown with my hometown doc. The hospital said they'd be willing to work with me on finances if my insurance doesn't cover it. Since it's a head MRI only it'll cost about $3000 with contrast, while the 3 MRIs by the neurologist will be about 3x that.
If the MRI comes back negative, and so does the heavy metal test, I'm going to assume that what I have is just anxiety causing severe physical pains. I just find it hard to believe, and everything tells me something is wrong -- but I will accept it.