When is enough, enough?

Hi I’ll try to keep this short, I’ve been having some major issues with my in laws family. That’s kind of a long story but my husband wanted to go to a birthday party at his moms tonight obviously I agreed although everyone drinks SO MUCH meanwhile I’m pregnant, no one knows about my pregnancy and I can’t talk about it because my sister in law will get upset since she had a hysterectomy. Anyways we got there at 12pm today my husband and everyone else drank ALL DAY well 8pm rolls around and him and his brother are arguing my sister in law who’s drunk asked me if I wanted to “talk” I said no this is not the right time. Anyways, I am over it...by 8pm I want to lay down and relax with my two other kids. We thought we were going to stay at my mother in laws but it just got awkward and my father in law was being so rude. I just told my husband let’s go stay at my moms 20 mins away. He said ok 10 more mins. So 20 mins comes and goes I said ok I am ready to go, he says fine then go. So I pack up my kids and dog (super pissed off and crying) he comes in the truck slams the door starts yelling at me in front of our kids..calling me rude because I didn’t say goodbye. I AM DONE! DONE walking on egg shells around these people DONE being POLITE and im a tired ass mom ok! Please tell me I’m not crazy...I try hard to be there for him when it’s his family’s events but I’ve had enough.