I've been wondering if I got this from going for a run. Less than a week after my current concussion, I went for a run. I ran a mile and a half. I wonder if that's why I"m going through all of this. The run was horrible, I had to walk/run. Normally I do 5 miles easy at a 9min pace. This mile and a half took me almost an hour. oops. not my brightest move.