paddyann while there is nothing you can do to mitigate the heardbreak of potential widowhood, I would have thought that your DHs health scare would have had the opposite effect to what you describe, as in a wake up call to be self sufficient, mentally emotionally and financially, incase the worst were to happen?
My DH means the world to me and if anything happened to him it would be catestrophic for me, but he is not the guardian of my welfare, he cant be! I have to be that for myself, and he for himself, with each others love and support of course.
I also would like to think that if I died and he lived, his "life" wouldnt end when mine did, and he would be able to carry on and look after himself