Deja vu? Or Living out a dream?

Have you ever had a dream that when you woke up you didn't remember much of it. Nothing strange was said, nothing out of the ordinary happened.. Just a plain, boring dream.

Then after a few days passed you realize whats happening around you is exactly what you had a dream about a few nights earlier? I have had this happen to me countless times, that I am in the middle of a conversation and I have been here before.

It is such a strange feeling inside when this happens; almost unexplainable. Wondering if anyone else has had this or any thoughts on the experience.