Experiencing Deja Vu

I'm a college student. It started two months ago. I'm always experiencing deja vu. Almost four to five times a day, and it's not just deja vu, I also experience slight dizziness and headache before and after. It is weird because some of it are true. First experience: it was Monday morning, and while I'm looking at the mirror, a terrible headache suddenly hit my head. When the pain passed, it felt like that day already happened and something bad is going to happen. Later that day when I was slicing some meat, I cut my finger. I felt dizzy and deja vu again. The very first thing that came into my mind is that someone is going to knock on our door. (I forgot about my wound). After a while someone did. It was my friend. He is the one who noticed that my wound is really deep and I'm losing a lot of blood. He helped me clean the wound. That was my first experience.

There are many other deja vus that I experienced (those that are true and happened later on), like the feeling that our instructor will give a very difficult surprise quiz, knowing the prelim grade even before it was shown to me, etc. These things suddenly pop out of my mind after a deja vu and a sudden headache/dizziness, I always tell myself or my classmates, "This day already happened!" Most of the deja vus are positive, few of them are negative like my first experience

I'm really confused right now, I don't know what's happening to me.