About two weeks ago, I was assaulted and ended up with a mild concussion. I was never unconscious, though there are a lot of things about that evening that I don't remember at all. For the first week, I was in a brain fog, had some aphasia, and was having problems with abstract thinking. Since then, my problems with speaking and thinking have improved a lot. I'm a university student, and this week I've been trying to get back into attending my classes, but I'm still off work. I'm still not allowed to drive or do moderate or heavy physical activity.

I've been reading about concussions, and I keep reading about overstimulation, but nobody defines what it is. Probably four days out of the last six, I'll start to feel not good. Sometimes I'll get a headache and become nauseated, and sometimes I'll start to feel jittery, as if I'd drank two pots of coffee. This usually happens after a class, though today it happened after some really mild physical exertion.

Is that overstimulation? I'm not sure what I still need to be avoiding.