Maybe I am unique but I am on Day 6 and have been driving around without any problem whatsoever. I have to work, I can't just stay home while I'm doing this. It takes me at least 45minutes to an hour to drive to work and back, not counting trips to stores.
I haven't gotten lightheaded, but if I did, I wouldn't drive. Check how you feel, if you feel ok, then drive. If when you're driving you feel dizzy or lightheaded, pull over and take something.