Congratulations on your first pregnancy! This is mine as well! i'm 25 weeks today and it's so amazing, have you felt your baby flutter/kick yet? it's the best feeling.
I found out I was having a girl, and had another ultrasound done a few weeks ago just to make sure, since her privates are more developed now, and it's dead on a girl!
So congrats once again and I hope you get what you want