This is a long shot, but worth asking in case anyone here has had any sort of experience with this?!
Basically, for a few days every couple months, or sometimes as often as monthly I get what I can only describe as severe Déjà Vu, but it's 100x worse because it leaves me mildly dizzy, feeling sick & it saps the energy right out of me. I've had it about 4 times today and it only lasts 15-30 seconds but when it's over I feel completely & utterly drained, it makes it near impossible to do anything. I always plan to go to the doctors but by the time I do they've disappeared and I feel alright again!
Anyone know what this could be?! Even if you don't can you comment to keep it bumped! 
Thanks!!!