I feel sorry for your troubles. Unfortunately, you are responsible for avoiding those dozy old cows. Whenever you are driving you should have enough room in front of you to stop in an emergency. If you had left the room, and had been paying attention, this would not have occurred. You did run into her, did you not?
Even on the Nurburgring, where most everybody is going flat out, the rules of the road apply, and you can be prosecuted and fined for becoming part of somebody elses misfortune.
Accept it as a lesson learned and move on. You got off lightly. Nobody was hurt. Count yourself lucky. It could have been a kid on a bicycle. Im sure you would be feeling much worse then...