It's the smell of his breath. The fact that he has gotten sloshed a couple of times since I've been preggo. I was a glass of wine a night before I got preg. Yes I did know that I would have to give up drinking when I got preg. But we have to sacrifice sooooo much to carry our children. I don't think it's too much to ask to slow down. I HAD to. This baby is half his. : /
Talk to him about the drinking and express how you feel. At the end of the day, though, you are pregnant. He is not. You can't drink; he can. You knew this when you got pregnant.
To be quite honest, this will be the first of many things where you feel like you are doing more/giving up more. You will hurt in the upcoming months, you will get big, you will feel like your chest is going to fall off when (potentially) BF, you will have the night sweats. Your husband will enjoy none of this vicious attacks on the body. But YOU are MOM and the mother-child bond trumps all (at least in my opinion).
My husband is wonderful and does a whole lot, but it's not equal. And if you ask people HONESTLY, they will tell you the same. More stuff always falls on mom. There will be wide varieties of this. Some dads do nothing, some say everything is 50-50, but in my "22 months young" mothering experience, moms always do more.
My "sagely" advice is to learn to let it go because you will only be angry and bitter, especially in the first few months of the baby's life. Men surely need to pull their weight, but be ready to let things go.