Those déjà vu things do happen.

Sometimes it becomes so unbearable that I am ready to climb the walls just to find out where I have heard, seen, sensed this or that thing or why the deuce it seems to me that I have done the thing before.

No, it doesn't seem, I am usually DEAD CERTAIN because I somehow remember the feeling - not the thing itself, not the circumstances, but that damn feeling. And maybe some details (exactly the ones that are the least bound to any recognizable realia).

And wanting to go back there (where?!) and dig it out makes me desperate.

Playing tricks, you say? Yes, tricks indeed. :)