Hi Kat,
I don't how you feel about chiropractic...or if you have even considered it...
here's some info links about what might be a part of your problem - maybe c1/c2 out of alignment or possible other cervical misalignments.

I had dizzy spells, vision upset, even cognitive problems due to a mix of RSI & TOS work injuries and the fact that I had been in misalignment for years. {horse fall/concussion}
I feel the misalignments were a factor with the various & chronic work injuries, since I have recovered fairly well with good PT & long term chiropractic care.

Chiropractic care info- a good one can help with many symptoms:
http://www.upcspine.com/self.htm
http://www.uppercervical.org/subpag...b/about_faq.php
http://www.spineuniverse.com/index.html
http://www.coloradochiropractic.org/.../glossary.html