Has anyone done an early ultrasound to determine gender?

Lauryn
I'm currently 16 weeks pregnant and due the first week of June 2016. I'm thinking of getting an ultrasound tomorrow ti determine the gender so I can tell my family (coming in from out of state) on Christmas! I don't know why, but I'm so nervous! I have two beautiful boys already and I'm hoping this is our little girl. What do you Mamas think? Should I do it or just wait it out?