Being a birth mother

So I am pregnant and the bean is going with another family when it's here. I am trying so hard not to get attached. I am 24 weeks and the baby is kicking. And I am trying to not get attached. I am keep telling myself that this is not my baby. But I keep catching myself thinking about baby names and wondering who it will look like. I catch myself singing to it. I am already starting to miss it. My family disowned me for being pregnant and giving the baby to another family. My husband and I can't afford another baby. The cupple I chose are so sweet. This is so hard I don't want to back out of the adoption but at the same time I want to know the baby. I wanna be happy about this it's just so hard.