Hi and welcome cantgetcontrol
This is obviously an emotive issue not only for you but for others too so I hope you'll take the straight talking here in the spirit of help in which its presented.
I would see your OB gyn and make a clean breast of everything.
I'm sure you're not the first mother would ever presented there with alcohol problems - they may be able to help or direct you to someone who can.
Yes it will be scary and maybe a little embarrassing to break cover - but you have a responsibility to this little bub inside you who deserves every chance you can give it...even if you've not bonded with it yet I'm sure you will, especially if you stay sober, leave the addicted you behind, and get back in touch with the real, genuine, uncorrupted you
D