I apologize if my posts are a bit exasperating - I'm sure that it's frustrating to hear whining like this over comparatively minor symptoms, but I'm scared and want to take the best course of action to get back to living my life as soon as I can.

The headaches following the head bumps and whiplash I described aren't just local soreness, the spots aren't sore to the touch at all. Rather, they feel like the sorts of headaches I got in the places I initially got headaches after the concussion, hence my concern.

It'd be easier for me to link cause and effect if symptoms consistently became exacerbated after doing a certain activity, but for me it doesn't seem that they do. I always have at least some kind of headache, and they worsen at unclear times. I can go on a 4 day backpacking trip and not have symptoms worsen until days after I get back, and then I can be playing solitaire and feel like my brain is overloaded (and the next day be OK playing solitaire).

I agree I need to stop trying to understand all of this because it's taking more mental energy than I can spare, but trying to understand what's going on is usually my method of coping with difficulty.