First time daddy freaked out.

Hey guys. This is my first post as well as my first pregnancy. I have been dreaming of having a baby for years.  My husband and I are recently married. Our first born is due a few days before our first wedding anniversary.  (I'm probably 5 weeks along at most.) I am over the moon, but my husband seems to be hiding a total freak out. He was open to trying, and is being supportive. When I took my home test he wasn't excited. He said we can't be excited until after the doctor. Now that we've been to the doctor, he is acting even more withdrawn.  Anybody else having a scared partner?