I need help!

I don't know what to do anymore. I'm 18 weeks pregnant and I thought pregnancy was supposed to be awesome. I have an incredibly hard working husband. But, every weekend he gets home drunk. Basically drowning in alcohol. And it's not just for one day, he can take two days in nothing but drinking. Well, last night he drove to a town an hour and a half away to pick up produce for our store. He said he's be back by 10:30. But he never came home. I messaged and called until 3 am. Turns out his cousin took him out to a party and he didn't want to answer the phone. I found out by tracking his phone. I just went to extensive measure to find everything out.  And I'm in pieces. And I was worried sick!