Great comments everyone. I appreciate it. Everyones experience and coping (or lack thereof), is very interesting and different. But you can almost break up into two groups. One group is very matter of fact and accepting, the other sad/depressed/ or battling those thoughts as I described.
I wonder what that is, if it isn't just aspects of our personality.
I'm sure I'll struggle with this for a while. I had children late (they are very small still), and while I enjoy them, i will be old when they become their own men. That is sad to me. I would love to see my family grow, affect future generations, and the thought if being non existent is still a bit paralyzing. I'm sure I'll cope and find the right place to put it. Its still a basically new thought. I just hadn't ever perhaps reached down and figured out why it was there.