Disappointed about gender ?

So I find out in 6 days what my baby is. Me and my boyfriend and most my my family are hoping it will be a boy because I've always wanted a little boy first. And  I know I would love it either way. But what if I'm a little disappointed that it turn out to be a girl? Has anyone ever went through that. I'm not saying I will be but what if my hormones get the best of me. Does that make me a bad person.