I don’t have ADD AFAIcan tell, I don’t get sleepy when I have a stressful task ahead of me, whether I get wired or not depends on the task.
Stress can be good or bad. The good stress energizes me: a deadline that’s hard to accomplish but possible.
The bad stress, as per the neurologist’s diagnosis, “sets my parasympathic system haywire”: I get vision problems (I see individual objects but they don’t relate well to each other, for example two contiguous walls and the ceiling don’t form a corner any more - I know they do but my eyes don’t really see that they do), problems understanding language (I recognize the individual words, but the sentences don’t make sense), vertigo (as in “everything’s wobbly”, not fear of heights), and eventually the shakes (left leg, then right leg, then left arm; it’s jolly good fun to have to stop at the side of the highway!). This happens when the stress is something I can’t do anything about; there are physical components (sudden changes in temperature, such as 48ºC outside and 18ºC inside) but the psychological components are more important (“claustrophobia”, stupidity).
The “claustrophobia” isn’t so much about small spaces as about feeling trapped; for example, I’m perfectly willing to hand-climb a 30m wall so long as it doesn’t involve a harness. Yes, I do know it’s a safety feature, but it’s not much of one when it gives me the shakes. The temperature thing, I can only control that to a point. The stupidity… that, I can try to avoid, but when you’re dealing with morons you’re dealing with morons.