Dunno about you… mine are always sourced from dreams. Usually months or even years prior.
But… I never remember my dreams the next day. Last nite, nope… don’t remember any dreams.
So the déjà vu, when it occurs, puts me in a weird funk because all of a sudden the current events trigger the dream memory. And then while trying to process the dream memory, events unfold around me at about the same pace, usually lagged by just a few seconds.
So, I know what’s gonna happen… but no where near in advance to do anything meaningful to change it. And certainly never about anything important or life changing.
Meh.