I had a concussion (mild for sure), two weeks ago today playing in a hockey game. I never went to the dr. but talked w/athletic trainers who all said it's probably a mild concussion. Rest, stay away from physical activity until the headache goes away and then start lightly and see how it does. The light headedness/headache (which was always quite mild) went away after a week. Four days later (so 11 days after concussion) I did the eliptical for 20 min lightly (heart rate 106 average where normally I'm in the 140's when I work out; resting heart rate around 55-65) and the next day the headache, although slight, was back. It went away again that night (Wed this past week) and has been away except today for a little came back after being on a computer a long time). I'm to fly to San Diego from Denver tomorrow will this be fine?