Welcome CGC,
This is gonna sound harsh but you have to stop. And if that means going to support groups where people with drinking problems recognizes you then so be it. You are literally killing another human being by your actions. So, you need to get humble and realize that not only is sobriety best for you but your unborn child. There is help and you have to get it. And I mean ASAP as in yesterday. I pray that you do the right thing and go to meetings, therapy, rehab, detox, whatever it takes.