Wanted a boy so badly

We found out yesterday we are having a girl. My husband and I both wanted a boy sooo badly. This is our first so I know there’s always hope for the future. I didn’t think I’d be this disappointed but I am, and I’m so ashamed of that feeling. I know this is a huge blessing and everything looks healthy and that’s what’s most important. But I wanted so badly to give my husband the son he always wanted, but now I’m actually the one that’s upset not him. How can I get excited about having a girl? Will it just take time getting used to it? I want my pregnancy excitement back and now just feeling uneasy.