Gender disappointment

Has anyone else ever experienced gender disappointment? We just found out our second child is going to be a boy. Our first was a girl. I felt so confident for some reason that this one would be a girl too that this caught me kind of off guard. I'm hoping once I start buying him things and decide on a name I will start feeling more excited but for the time being I'm just not and I feel terrible about it 😕 is it just me? 😔