Weird postponed gender disappointment?

I had a little boy first and kept all his clothes and things Incase our next was a boy. Well it’s a girl and that’s what I wanted this time but after going through my sons old things I find myself kind of sad that it’s not another boy. Maybe because I could reuse his clothes and hold onto my sons babyhood a little longer? I’m not sure. I kept saying how I wanted a girl and now I’m in a funk. I’m also kinda of sad that my son won’t have a brother I guess. Boys are also my comfort zone. I’m kinda scared to have a girl.