Nightmares 😭 please read!

This may be far fetched but I’m getting scared now. I know pregnancy causes more vivid dreams and blah blah blah. But I’ve been having some nightmares. Each time they get worse. It’s becoming once a week for the last 3 weeks. First one was a guy trying to rape me and hid in my car waiting until I got in. The second one was a zombie apocalypse. They tried to get me and my dog. But now...... my last one REALLY fucked me up... I just woke up from it. My boyfriend and I were in bed talking on CHRISTMAS when the cops and some random guy barge in and the cops shoot him dead in the head. The guy collapsed on our bed and then fell to the floor on the side of our bed. I was crying and my boyfriend didn’t know what to do. He called the cops and the cops laughed and said they’ll come by in the morning to make a report. In my dream it was sometime after midnight. I wake up my boyfriends brother and tell him what just happened. He didn’t believe us and walks in the room and says “oh I know this guy, you guys are playing” and touches his head and I said “don’t! There’s blood right there. He’s dead!” Next thing I know the dead guys WALKS out of the room..... LIKE A DOG!?!?! A possessed dog at that?!?! I said “oh hell no” and slammed the bedroom door shut and as I slammed it he turned to look at me and then I woke up.

Why are these dreams happening!? Does anyone know what they mean? I know some people don’t believe in dreams meaning things but this one just really stood out and fucked my head up. Someone please reply kindly.