ANGER!

Okay this is my first successful pregnancy and I'm 16 weeks and 1 day. I don't know why and how but when I'm not in the mood I'm understanding and I don't respond but I get ANGRY when I feel irritated. I mean yelling, kicking, cussing and irrational angry. My partner is getting the worse of it to be completely honest. He's handling it pretty good by just trying to talk to me and see what he did wrong or just leaving me alone ( which is he's best option). I mean the simplest things makes me want to kill people 😐. I don't know what to do, I've tried everything to calm my ass down but I can't. What should I do?