Mourning the child you'll never have

We just found out our second and last is going to be another beautiful little girl.

I'm excited to have a second daughter, and for my daughter to have a sister because I never had one!

At the same time as I feel that happiness, I'm also feeling sad for the son I'll never get a chance to have.

We were kind of hoping for a boy, so we'd have one of each.

My husband is also sad knowing he'll never have a son.

Anyone else go through these feelings?