Yes, I think about it all the time. Well, not all the time, but whenever I have a little health niggle - a headache for a couple of days or some sort of random pain and also on occassion when I'm driving alone. I think for me personally it has a lot to do with my own mother dying from cancer at a relatively young age. I would hate for DS not to have his mother growing up and I would hate to miss out on him growing up. I try not to focus on it too much though.