@Ragman,
Sorry for the late reply! This is Icebox, though I've since forgotten my password to that account, so here is my new one.
It took quite a while to get everything arranged and to rule out some possibilities. My iron was again checked, and was normal. To be sure I was put on an iron regimin for 6 weeks and then had my blood checked again. It went up some, but my symptoms still persisted so he ruled out anything related to weight/anemia/etc. I had yet another ekg because my old one was [obviously, as you had stated] a little out of date. It was fine. Because neither my blood or the ekg showed anything, I was given a month-long heart monitor.
I sent in my results and had it viewed by a cardiologist. Apparently I have a ventricular problem [I believe he called it ventricular synosis]. When my body releases adrenaline, my heart doesn't gradually increase in speed. I may have a lot of anxiety and adrenaline, but my heart is still very normal. Eventually it realizes I have released adrenaline and then instantly increases speed. One of the recordings I sent in showed an instantaneous jump from 75 to 170. My blacking out episodes were caused by the major shift in blood pressure.
Anything can cause an episode; from stress, from caffeine, from excitement. Even riding bike or exerting myself can cause my blood pressure to change instantly. I was told if my symptoms get worse or more frequent that I have to be put on beta blockers to keep my adrenaline blocked indefinitely.
The good news is that he said some people mature out of it in their early to mid twenties. My mom told me I'm not going on beta blockers period [she hates the idea], so I guess I just have to manage it on my own.