Is there a meaning behind this?

For the past two months I’ve had the scariest dreams. Most of them are my fiancé cheating on me. Another my baby died inside of me and last night was my 5 year old daughter died. I’m struggling with these cause I wake up crying and it feels so real. Does anyone know the meaning behind these awful dreams? It’s only happened since I’ve been pregnant! And it seems to just be getting worse the farther along I get. I’m 19 weeks.