Worry expands to the problems* available

* Or: ‘work’

Illustration:

Something absolutely terrible could happen, and you worry. Fortunately that thing doesn’t happen. You are convinced that after that – nothing small will bother you any more. You are not going to ‘sweat the small stuff’.

A few weeks later – you are in a situation where something slightly serious could happen (but not in any way ‘terrible’). Nevertheless you find yourself worrying quite a lot anyway.