Repeat or Replay?

Obviously it'll be a little hard to tell, but if anyone knows if I'm somehow specifically pulling this dream from an external source, I'd be very grateful. You see, I've had, with minor differences, the exact same dream, several years ago.

( Stop me if you've heard this one.. )

But the thought occurs to me that if I'm replaying the same scenes, maybe they're not my scenes... maybe I'm remembering a book or movie or something.

Anyway, thought it couldn't hurt to ask...