I really think it's a good idea to give up alcohol. Doctors have zero idea how little or how much alcohol can affect a fetus. Not only that, alcohol can play a part in fertility problems. Your husband should stay away from alcohol too, and be healthy.
I kind of acted pregnant, by default. I can't drink caffeine, because it has terrible effects on me. I don't drink alcohol. I have food allergies, which force me to not be able to eat junk. I can pretty much only eat meat, fruits, and veggies. I don't know if that made a difference, or not. It DID make me feel better about the health of my son. He has still never been sick at 2 1/2. He loves his fruits and veggies. Who knows if my body being healthy had anything to do with it. I did snap back back immediately after my pregnancy. Everything tightened and went back to place within 2 weeks. My body is the same now as it was before. I think a little of that had to do with my body being healthy before. Maybe not, though.
Oh, take prenatal now. Make sure you're getting plenty of folic acid. We did the same thing as you. We didn't actively try, but we didn't use any protection. A month after we made that decision, I had a positive pregnancy test. It can happen pretty fast!