If you look for it, there’s always something to worry about in lıfe.
When you’re in school, you can worry about what grades you’re going to get or whether your classmates will like you. When you’re working, you can worry about whether you’re going to complete a project on time and whether you’re going to be promoted. When you have a family, you can worry about whether you’ll be a good husband or wife, a good father or mother, and whether you’ll be able to provide for your family.
Worrying is, to a certain extent, beneficial. The reason is that it helps you focus to solve a problem and thereby avoid what you’re worring about from materializing.
However, most people, myself included, often worry beyond a beneficial point. This becomes clear when you look back at the things you worried about and realize that most of your worries didn’t materialize while, among those that did, you overcame most of them and time has healed the rest.