It starts on monday.

Well in your case the car drive wasn't that rough I guess? You said at least that you are able to do some things. I'm down since tuesday, have to stay in bed the whole day. I also feel like in the first days after my concussion. It's quite amaizing that everyday stuff like car or bus drives have such an effect. At least in my case i would say the bus was just shaking for a few seconds, it did not hit a real pothole that would cause the passangers to lift. Let's hope it's no new concussion.