Decreases sex drive?!

First time mom, just about 8 weeks and I really haven't had the urge since we found out, which was almost a month ago!! Hubby and I are so excited to become parents, we talk about the baby all the time, he's working so hard and so many hours, so we haven't even really talked about it, just seems we're both okay with not having sex right now. I hear increased sex drive is normal but is decreased normal too??