I HAVE NO PATIENCE!!

I work as a nanny and I'm almost 22 weeks pregnant. I have NO patience anymore. I find myself becoming frustrated at the tantrums, yelling and fighting that happens every day. I watch 4 children. I'm not worried about being this agitated and stressed with my own, but more curious if anyone else has felt this way? It's to the point that I want to just quit and enjoy the rest of my pregnancy.