My concussion was bike related and lasted about 6 weeks, first 2 weeks while i was off sick from work was just headaches, when i tried to do normal things when i returned to work thats when i struggled. I did daft things, first was i turned up to my previous work place which i had left 2 years ago, only clicked when i stood outside and though, eh? what am i doing here! I used to walk into offices at work and wonder why on earth i was there, and when i visited the doctors 4 weeks into my concussion he sent me straight to hospital which was 4 miles away. Did i call a cab? no, drive? no, catch a bus? no, for some reason i walked. Still today i have no idea why i walked!
I had a scan that day and was told i had delayed concussion, and had to wait for it to clear, this took another 3 weeks.
The biggest effect was work, as a manager, people around me lost faith in what i could do, and i ended up having a rough time when i recovered, to the point i had to leave and find another job. But my new employers can't see why anyone would of let me go!