Is safe to tell gender or wait for a second confirmation?

Britney
I went last week to get a gender determination ultrasound done and the tech confirmed that I was having a girl! I was so excited! I go Friday for my anatomy ultrasound and they are also going to tell me the gender then. I know it's kind of silly but I just want to be really sure before I start telling everyone. Looking at the ultrasound what do you ladies think?