Dreams about my SO

Ariana • I'm 20 and we're currently pregnant with baby number one. EDD October 28 2015. 😊👶✨👶🎃
Since I've been pregnant with our little pumpkin baby I've been having these dreams about my fiancé cheating on me. Honestly all the man does is work and come home and out of the 6 years we've been together he's never cheated (that I know of). I don't know why this is happening but it makes me sad I even had a dream he slept with my cousin and was going to spend Christmas with her instead of me and the baby. Can somebody explain why this is happening is this a sign or is this just another crazy pregnancy thing? I feel like a crazy person making this post but these dreams are so constant now idk what to do.