The little nag at the back of your mind

I think this is something to do with the "territory" that once you get something like cancer and you (kind of) get away with it - there is a nag at the back of your mind that suggests:

1. You are susceptible to getting cancer so you could get some other form
2. This will come back
3. You are more likely to get something else serious
4. Your life will be shortened.

Yes - I know - but that is how you think. I know that I cannot have this particular cancer spread and that I am monitored more now than I ever have been. It is just one of those things, like the sword of Damocles.

It sort of worries me but not enough to keep me awake at night, it just nags away when I have too much time to myself.