I just need to vent! maybe some advise would help!

So I have known my fiancé for over 2 years we haven't been together that long only a couple months. We fell in love very quick. He lives with me and we move out into our own place in a month. We get along very well and recently I have been getting very annoyed with him. It's like 60% of the time I'm annoyed. I can't figure out why. He is the most wonderful guy I have ever been with. He treats me amazing! I don't want to be annoyed or bothered by him. I don't know if it's my pregnancy hormones but I need advise! I'm tired of feeling this way!