Pregnant. Excited and a bit worried.

Okay so me and my fiancé found out yesterday that I'm pregnant and he was happy he's been wanting kids for a while. (We're both 21) not married yet. Well we told my mom and she was a bit excited. Then we told my dad and my dad loves me I'm his only daughter and I'm the oldest child...well I don't think my dad is happy. He didn't show any excitement. And has been really serious and my fiancé noticed. So now my fiancé is really bumbed out it seems like. And I am bumbed out to like I just want him to be a bit excited I'm already stressed out about telling the rest of my family because they are really religious and I am not married yet...I just am really nervous of what they might tell me. I don't want to be the center of  their conversations..