Gender disappointment

I am 14 weeks tomorrow and will be having a 3D scan to find out the gender when I am 15 weeks. I’m so scared I will be disappointed if it isn’t a girl as I already have a boy and this is our last. I know I am happy either way but I would love to have a girl. I have a strong feeling it’s a boy and had a dream I had my scan and it was a boy but we did a balloon reveal and it was pink lol. Has anyone found out and felt disappointed? Did you get past it?

We are wanting to keep the gender a secret, has anyone been able to do it for the whole pregnancy? We had a surprise (we didn’t find out either) with our first and want to surprise everyone else this time too lol