Wow Deja Vu,
ok so having deja vu is not something to freak out about, I constantly have it. but deja vu is not really the issue here, it is actually astro travelling.
deja vu is the after effect to it, so the constantly go hand in hand.
Again I have it many times, sometimes it is something small, like going to the store, and other times it will save your life, *case and point Holder*