I had a concussion approximately 5 months ago. Is it normal to feel good for a few weeks and then "relapse" to where you don't feel like doing anything, have a headache, etc? When I feel good, I tend to do as much as a can to make up for the times when I feel really crappy. Then it just sort of hits me and I am tired all the time and have a hard time doing the things I really like to do.

I am frustrated.