Drunk Loyalty

I'm 24 weeks pregnant with my first. My husband decided to go out with his co-workers. He didnt tell me. I came home and the lights were off. I didn't think anything of it. He tells me he went out to get food. I hear the car pull up and look out the window to him changing clothes in the yard. He comes in the house. I ask if he has been home all day. He lies to me. He face sinks. I know something is going on. By this time I knew he was drunk. He continued to lie to me. After about a hour he confesses. He tells me nothing happened he was with guys. Today he tells me he was with guys and girls. On top of everything he was driving drunk. I just don't know where to go or do from here.