It seems normal to me.

This happened a lot during my last concussion. I would feel great and go to classes, go to work, and then the next day I'd be laid out.

It's happening with my mild concussion now as well. The past week I felt like I was coming very close to being healed. And these last two days I've felt pretty terrible. Probably a result of going out and about and doing more, spending more time on the computer - who knows?

I've had a lot of injuries and illnesses in my young life, but head injuries have by far been the worse. There's no clear timeline, and it's frustrating.