Well, to get to the point, I don't have the professional knowledge in this field, which may not solve your doubts, but I can tell you how I did it and may provide some experience (I often have similar feelings or things).
I usually encounter this kind of thing, and I may be confused. Of course, one day at the most, because it can't be solved, it is also because it has met a lot, which proved to be a good choice afterwards. Forget it, it comes down to your mental illness or temporary hallucination. Don't fantasize that you are the protagonist of the movie. Don't think this is an opportunity, there are some amazing secrets that can save the world.
I just met a similar incident a few days ago. I slept in the dormitory at noon and in the middle of making up lessons. I turned around and saw someone washing clothes and going into the dormitory to get a hanger (clothes were washed on the balcony outside). I saw one of my classmates, but he was not in our dormitory. His dormitory is on the first floor. We are on the second floor. I was surprised at first. I thought he would come to our dormitory for something. I thought he would say hello to me (he only knew me in our dormitory). But I didn't. After a while, I didn't hear him come in (I turned to face the wall again). Then I fell asleep and woke up. I find it strange, too. After thinking about it, you should understand. Then I confirmed my idea. In the end, that person is not what I thought. That classmate is another one, and my classmate was not there at noon that day, which means I really hallucinated.
Also, people often feel deja vu, and feel that it has happened before, but I often do, but the last time I read a book, I said it was because we "stole" other people's memory experience, which means that we know other people's experience or read a book or something, and we may regard it as our own memory experience, so we can't explain it clearly in the next encounter.
Wow, I'm so wordy. I should stop talking.