Ouch! I haven't done this with my driver's license, but have a couple of times with my military ID card, at times when it was important for me to have a valid one. Now we live so far from any military facilities that when I didn't renew it, I didn't think that much about it. One day I woke up (DUH) and realized my ID card acts as my insurance card. If I had a medical emergency I'd have to proof of medical insurance. OUCH yet again, you know you'd pay far more than taking a test! You better believe we were down at the local guard/reserve office tout suite!!!! So it isn't you being ditzy. We all forget important things when we get busy.