Why do i dream about having panic attacks?

Panic: Anxiety dreams are not uncommon in panic disorder when there is anticipatory anxiety and worries as you go to sleep.

Suffering Squared: I presume these aren't your most favorite dreams. One of the things that can feel worse than having a panic attack is dreading you're going to have one! this means you get to suffer before you even suffer! no one can say why you are dreaming about this but i wonder if your dreams might not reflect the same kind of dread. I'm curious: what's your theory about why you're having them?