Keep having weird Dreams :(

Crystal • 28, One 👼🏻 & One 🌈 Child & Baby on the way🤰🏻
I'm 38weeks pregnant. The other morning I had a dream that my bf died but I couldn't believe it and kept saying to everyone he easing and turned out he was hiding and pretend he was and turned back up in my dream like nothing happen I was so heartbroken and angry in my dream. And now I just had a dream that some girl was sitting of his lap and he was acting like nothing was wrong with it. Had an argument about it in my dream and was like fine I'll go sit on some guys lap and see how you like it. 
Why am I having these dreams, only one else having them? My partner is fully trust worthy and would never do these things which makes it annoying