Weirdest thing about the feeling of Deja Vu to me is not that it feels like a memory, but that it feels like a memory that happened an eternity ago many times.
I mostly get Déjà rêvé. The most recent couple of occurrences actually made me feel quite panicked. Very specific scenarios that I'd already dreamed long ago. Freaked me tf out.
(And no, I don't do drugs. Or alcohol)
I once realized a clear memory I had of an event was completely false, as in, that event couldn't have happened. (Both realization and the event were in my childhood, maybe 8 y.o.).
For me, too, I’ve had periods like that, especially in childhood, where it happened often, like weekly. But I haven’t had deja vu in years.
Our brains are complex, I guess…