Overly Emotional...SOS

Emma • Ervin 8/2016 Baby Number 2 coming 8/2018!!!
Ok ladies...so lately, the past 3 weeks or so, I have noticed I am incredibly irritable. I have zero patience for anything, I am in full on nesting mode (30 weeks preggo), I disagree with everyone, I get irritated so easily, and I get frustrated with everything, even myself. I feel so bad for my SO. He's been bearing the full brunt of my wrath and I feel so horrible about it. After I realize I've turned into my emotional monster self, I have enormous amounts of guilt and want to cry. I feel like a terrible person, a monster. 
 Anyone else going through something similar? Can you relate? Any tricks to relax and just go with the flow more? I thought maybe my emotions would calm down a bit by this point or that I would have better coping skills to prevent these feelings from taking over my life...but no such luck. I know that emotions run haywire during pregnancy but geez I just want to get a handle on things and feel more like myself!