Need some Opinions

I'm currently 22 weeks pregnant. My husband has been going out after work, sometimes on the weekend just to get nasty drunk. I would say about 1-3 times per week. He's also driving to and from these locations. I've asked him to call or just text me if he is going out, but he never does. He comes home anywhere between the hours of 9p and 3a. I call numerous times, but he never answers his phone. I'm left at home worried if he is hurt, caught driving drunk, cheating and a plethora of other things. This has been going on for some time now, even worse now that I'm pregnant. He is no way physically abusive, but he would sleep all day if it's on the weekend after drinking and not talk to me all day. He just acts like I'm the one that makes him drink. I'm totally devoted to him, but lately I don't know if the feelings are reciprocated.