Hi Jane,
What you're talking about is pre-cognition. It's a very common phenomenon. The brain can't distinguish when emotions happen, whether that be past, present or future. The easiest way to explain this is that, you read something in the future and it had a profound effect on you, and now you're remembering it, but you're remembering it before you read it. It works particularly well with reading.
There's some youtube videos, specifically Robert Targue or something, he talks all about that.