I always think of bad things, but they come true. What theory is this?

I've been thinking about bad things in my heart, and then they really came true. This is actually the result of a person's long-term self-psychological suggestion. Of course, this does not mean that the bad things have really come true, but that they are self-righteous and think that the bad things have come true. Because of the alarmist thought that something bad might happen, the suspicious mind always thought that something bad might happen or something bad might happen. So when something bad really happens or something bad happens to you in the future, you will subconsciously think that what you thought was bad has come true. In fact, nine times out of ten things in life are unpleasant, so everyone will often encounter bad things, so don't pay too much attention to these mysterious things.