I apologize in advance for the length.
I've only told two people about these dreams, but I made a throwaway anyway because they're so distinctive.
I broke up with my first boyfriend because I wasn't happy anymore, but I had a hard time pinning down exactly why for a long time. Shortly after the breakup, I had a series of three incredibly disturbing dreams.
1.) After this one I woke up in tears. He had a painting. It was in a pop art kind of style. Everything was pale blue, red, or white. It featured a solid background and someone balancing on a striped ball. Whenever my ex would hold it up in front of me, I would be paralyzed. He used it to keep me frozen so he could torment me.
2.) This one was the strangest. I was at an outdoor shopping complex at night with a new guy. I was wearing new clothes and having a good time. The ex shows up and wants to hang out and be friendly. Pretty soon, he's insisting we go swimming and that I take off my clothes. I really didn't want to, but the dream jumped and suddenly I was in the water with all my clothes on, ruining my new white leather jacket. The dream jumped again and my ex was standing in front of my car. There was a glass vase sitting on the hood. This vase was very important to me for some reason. He kept tipping it over and letting it fall before catching it and setting it upright again. This upset me a lot because I was afraid he would break it, but he kept doing it and seemed to enjoy my distress. I can't remember if he ever broke the vase or not.
3.) This one was the worst one. He showed up at my house with a cowboy and said he wanted to commit assisted suicide in my bedroom. For some reason, I accepted this and let him in. I remember waiting outside in the living room for a long time just waiting to hear the gunshot. Finally it came. My ex then wandered out of my room moaning like a zombie with blank eyes and a leaking bullet hole in his head. He wandered around the house for a while and all I was concerned about was him getting blood on the furniture. He went to lie down on the white couch in the living room and I kept pulling on his hair to keep his head off the fabric. After that I started to worry about blood in my room. I never went to look, but somehow I knew there was blood sprayed all over the walls. When I finally woke up, I was fucked up for the rest of the day.
I typed all three of those out because of how important to me they ended up being. I had been struggling to figure out why I was so miserable at the end of that relationship. After these dreams, I was forced to reevaluate a lot of the things he did that I thought were my fault for being a bad/inattentive girlfriend. These dreams and later learning about healthy relationships helped me realize that he had been emotionally abusive and manipulative. After that, I was able to really start the healing process.
So sometimes your dreams are just weird. Sometimes the weirdness is your brain working through things that have been bothering you, but you don't want to face.
TL;DR: Had a series of extremely disturbing dreams after a breakup that helped me realize the relationship had been abusive.