So this is now my "official medical diagnosis". Evidently I was in pure autonomic failure when I went into the clinic (I'm 26yo btw) but they stabilized me. The doctor didn't explain it very well. I've googled it to death and still don't get it. All I know is that I pass out all the time, now have a pacemaker and have to take loads of meds to keep my blood pressure up.
Aparently the autonomic disorder you are referring to is some sort of malfunction of the central nervous system.
The autonomic nervous system (ANS) is the part of the nervous system which regulates heart rate, blood pressure, temperature, breathing, etc.
It is what keeps us ticking, without our involvement. Most of the time we do not need to think to breathe for example, it just happens by default - well this is the ANS in action. You can say that it is like your body's subconscious layer.
Strangely enough, from what I understand, it is actually possible to make some of these function conscious. For example, by thinking about your breathing or your heart rate, you can actually change it. Simply by observing your breathing you will change it.
Try it out now... Just close your eyes, relax, and watch your breathing pattern for a few minutes, without trying to change it. See what happens....
Just out of curiosity, did you suffer some kind of physical or emotional trauma that led up to this disorder, or have you always had this condition?