night mares

I've been having so many night mares almost every night. Anyone else experience anything like that? I take my prenatals at night and all my supplement and diclegis. I usually drink a glass of water with it. Had a few miscarriage dreams and they're all so realist and tragic. I've had dreams of fighting with my boyfriend and best friend. None of this is actually happening but it's bringing me down a lot idk why this would be on my subconscious? Anyone have a similar issue or have any idea of why this is happening? I'm anxious to fall asleep tonight because I just want to relax and not deal with this on top of the stress of being 17 and pregnant.