I am not on medication either. I haven't been for over a year (I wasn't put on any new meds once I got pregnant.) Anyway, I have horrible nightmares! Most of my dreams are nightmares. They are most the thing that would scare me most, something bad happening to my husband or kids! But sometimes they are bad things happening to me. I mean, horrible things! And extremely realistic, too.
I don't know if it's a bipolar thing or a non-medicated thing or not. But I know I have lots of bad dreams.