When I look back on my early posts, I noticed that I was asking questions about things that I had a gut feeling I KNEW the answer to already...
His mother is an alcoholic, he makes excuses for not drinking tea or coffee but drinks 1.5-2 bottles of wine instead to help regulate sleep, he makes broad claims about how he can just stop when the baby comes etc...
I think you're asking us to maybe say "nah that all sounds normal ish and it'll all be ok..."
I am sad for you and worried for you... When a baby comes and there is not any routine sleep schedule and there is a lot more stress, I predict your husband will have more reasons to be drinking...
I second and third all the advice you've received about al anon...
Keep posting... We are all here for you!