I know scottishdiem, I didn't handle it well
No, no, no, no, no! DO not blame yourself for this and do not let someone who's inane comments show they don't have the first beginnings of a clue about what fucking utter mind-twisting torture it is to live with an addict in denial. When you sipped the drink, knew there was alcohol in it and your husband kept insisting there wasn't, he was fucking with your perception of reality. It's a serious, very, very damaging form of emotional abuse called gaslighting.
My ex husband is an alcoholic turned drug addict and his lying in the face of evidence came drove me over the edge of sanity so, so many times. I will never forget the awful, fucked up feeling of knowing something was true but having him lie so sincerely, with stories so bizarre they were either weirdly true or he was a fucking psychopath. I used to literally feel reality shift about me as my brain tried to put together what I knew for an actual fact and the stupid, stupid lies told with such complete conviction that I doubted my grip on reality.
There is little you can do about his addictions but there is a lot you can do for your baby and the most important thing to do is to keep him/her out of the situation you are in. Because if you don't, the time will come that your husband is down this same road, lying to and warping the reality of his child instead of/as well as you. Whether your future has your husband living with you and your child or not, is up to him and whether or not he faces up to his addiction problems and genuinely deals with them.
Do read up on gaslighting. Read about it in depth, read other people's descriptions of being gaslighted, read psychiatric papers on how it works and how damaging it is. Even watch the movie(s). Because once you know what he's doing, it loses it's power. I almost feel sorry for my xdh now, as I've become so detached from his lies that they are easier to recognise and shut down. An addict isn't being a villain when they lie, they are just trying to maintain their addictions and their relationships with the people who their addictions are hurting. But that doesn't stop the gaslighting from causing you very real pain and emotional damage.