Pregnancy appt

so I have an OB appt tomorrow and I am going to do my AFP test, I am hoping that the test comes out ok.
I am 17w so I won't be getting an u/s at this appt but will get to set up my appt for my big u/s, I hope so much that the baby cooperates and I can find out the gender, my first prediction is boy, but the longer the pregnancy goes the more I think that I want another girl! I wouldn't be way upset if it is a boy but I am starting to think that I may feel a bit of a let down, I really love the frilly dresses and head bows and cute girly stuff, I know that Dh wants another boy mostly to even things out since we have 2 girls and a boy already but I wouldn't mind having another girl.
I feel like I have to wait forever to find out what the gender of the baby is and I am going crazy, I am going to feel bad if this baby is a boy because I have been calling it she and her for the past few weeks!LOL!!
Maybe I can talk my OB into getting a sneek peek at the baby tomorrow, although I doubt it!!