You have to let him know how different your hormones are. It's soo hard to get used to them and just hope he understands. It's not our fault we just dont control our hormones now
I'm going through the exact same thing. My fiance and I always fight mostly because he can't handle me and these crazy mood swings! I'm 16+5 weeks and I feel like such a b*tch! In my opinion, the best thing too do is allow each other enough space to cool off and relax. I bought my fiance a pregnancy book for new fathers called "Dude, you're gonna be a dad!" that speaks his language. It helped a ton and he now understands why I am the way I am. Also, try taking bubble baths or reading to make your own life as stress-free as possible. The baby feels what you feel. Good luck!