Overthinking makes you worry much. Let me tell you why.
When you face some problems, you tend to think too much or too long about them in the first place. As a result, your brains work more. You may call it overthinking. When you do so, you are sure to see more problems around you. So you fail to see the solution. And you worry much. Then what to do?
Once you realize that you are overthinking, then ask yourself this question.
Can I take some action to solve my problems?
If the answer is yes, take those actions and don’t worry. If the answer is no, it means you don’t have any control over the situation right now. So don’t worry.