I am not having my finest moments lately, my SO and I are squabbling a lot mostly because I'm tired…

I am not having my finest moments lately, my SO and I are squabbling a lot mostly because I'm tired and emotional and fed up with how taxing pregnancy physically is when I have so much to do but zero energy to do it. You guys know I am thankful for this pregnancy but my SO is just aggravating me because he thinks I'm overreacting and being too emotional. Which is partly true but at the same time this is not his first rodeo he has 2 other kids by a prior relationship. I hate being out of control I'm just hormonal, hot, and tried to calmly explain myself but he doesn't get it and so I do react hormonally. Help me. I need to chill but can't seem to.