2: "What's wrong, do you have a headache?"
1: "Kinda-- Just feels like reverse deja vu."
The short form or slang for this Reversedéjà vu effect could be called a Reversearoo.
Meaning: Having a Déjà Vu while experiencing it in the reverse order.
My wife had a powerful Déjà Vu while we were driving to a destination, however she had the distinct impression of experiencing this event in the reverse order. I jokingly dubbed it as a Reversearoo, and on further thought decided the Scientific name for this phenomenon should be Reversedéjà vu for all practical and applicable circumstances.