I had a nightmare that was actually made up of a bunch of smaller nightmares. Basically, I would find myself in a scenario and I would have to escape or survive or whatever, and if I died or got whatever that scenario's bad ending was, it would either repeat or I'd get a new one.
The scenarios weren't so bad at first, they were surreal and a little upsetting, but not to bad. In each one I always had two companions with me, so I wasn't alone. But as I died/got bad endings and went to new scenarios they got progressively more scary and messed up. And my two friends appeared less and less until they were gone all together.
The worst one was when I woke up in what was clearly a zombie nightmare. I get zombie nightmares a lit, and I hate them. When I woke up in the zombie nightmare I basically just said "nope" and started violently bashing my head against a table trying to die so I could skip this scenario.
So... yeah. I might have issues.