Hugs to you, NbyNW.

Shootingstar, I think people tend to overlook the amount of energy that visual attention takes. When I had my concussion I was young and dumb (and in my defense there wasn't near as much publicity about TBIs as there is now) - but believe it or not, I had a similar experience returning from a hand injury. My first few motorcycle rides after it healed, left me completely mentally exhausted. When you're on two wheels you have to be 100% on, and when you've been away from that for a while it can be very tiring even if your brain is only "out of shape." So with your injury, I think it's completely natural that you're so worn out by it. Take it slow and easy, keep being gentle with yourself as frustrating as it probably gets sometimes. Hugs your way too.