Dreams or nightmares?

So I dream a lot, and most of the time it's good. Weird but good.
But sometimes it's like a nightmare and I had one today again. It wasn't that bad with monsters and stuff, I do have those too, but it involved my ex. For some reason she was screaming at me and later on she wanted to kill me with a knife. I was trying to hold her back and suddenly I was not fighting against her but some guy with a pistol. I tried my best to get the pistol away from him but I couldn't and so I threw him over the balcony where he smashed into the ground. Quite dead alright. And then everybody started yelling at me and I woke up.

So that's some of the stuff I dream up.