Deja vu is a feeling. when you feel like this all has happened which is right now going on or this all is repeating again, then it's a Deja vu feeling.
So have you ever felt Deja Vu? :)
I get deja vu every week, at least. I later realized this was because when something is about to happen, i think about what will happen, and when it does, im like, “where have i seen this before?”. So yeah, its complicated.