I used to get Deja Vu multiple times a week, however recently I stopped getting them as much, and it's become very rare. I've been having many more lucid dreams however. I think Deja Vu's are dreams where we forsee the future and they're stored in the subconscious. It's not until something in the dream happenes that we feel we've seen it before. I used to have Deja Vu's that would last minutes long. The feeling was really strange.
that happens to me sometimes with conversations in dreams and weird stuff that I see and then I actually do see them and get freaked out they are cool though lol