I've always had stress issues and over time the manifestations just change. Right before the anxiety and panic attacks I was just unusually hostile and didn't do much of anything but math and music, and eventually I just started getting paranoid about the stress giving me more serious health issues... one thing led to another and I just wound up having serious panic attacks. I'm not sure what changed a few months after that, although I suspect that I was just more challenged and engaged in studies, but a short while later the panic attacks went away and I just went back to being hostile and unapproachable.
The way I deal with stress changes with time and I don't think I have much control over it, although a good round of screaming at walls, playing guitar, and solving math problems cools me down most of the time. When things get really bad I just get strange, barely controllable urges - I'll find it very hard to hold back from punching someone I suspect to be thinking about fruit, or I'll have to throw paper airplanes with fortunes of impending doom off a roof, things like that - and at that point I just give in to whichever ones seem less harmful to my future as a graduate student. Fortunately, I usually get away with most things without problems, like posting nonsense messages on my office door and bulletin boards or the occasional Airsoft war in the hallways. There are advantages to being clearly marked as "oddball", but unfortunately qualifications have to outweigh eccentricities or nobody puts up with shit... yet another good reason to go to college.
If you have an actual physical condition that causes problems I really don't think our situations compare much, since mine just comes from being obsessive about a few things (math) and not wanting to deal with anything else (food, sleep, jobs, behaving appropriately) because it's not worth the time. That's probably something you should talk to a proper doctor (endocrinologists, I think they're called, deal with that kind of thing) about, since adrenaline isn't healthy for a lot of things.
Jeff