Sometimes we cannot say the reason why we are worrying. In this situation, we should think twice before we make any big plans. For me, I would like to write down my worries in paper and analyze it. Worry is a devious foe for several reasons. First, people who worry a lot most often see their worries come to naught. In other words, most imagined catastrophic scenarios don't actually materialize. One would think that a system (worry) that constantly fails at its job (predicting the future) would be abandoned. Instead, the opposite usually happens. In this situation.

Okay, we can still talk about the reason. This is because our brains tend to confuse correlation with causation. In this case, since worry is associated with things turning out OK, worriers begin to believe that it is the worry what made things turn out OK—which is in fact false; research shows that worry hinders rather than facilitates effective problem solving. Hence, worriers tend to increase their worrying in response to their failed predictions of catastrophe. Over time, worry morphs from a habit into a requirement born of superstition. 

Of course, I don’t say that we cannot use durable double gray cardboard in China for the memory matters. You can try if you like it. I just want to say that you can stop your worries with the assistant of paper.