Hi, Feary, hunnybunny...
I've had some of the same kind of obsession. I'm 59, really alone, and I've worried, still do worry, about what is going to happen as I age. My way of dealing with this is to focus on the present. I still have my health, good friends, and a good job. It's kind of like burying my head in the sand, but I choose not to dwell on it. If I (you) dwell on it, it becomes overwhelming. Live in the NOW!
Patty