Ultrasound confirms

Jessica • 29 years old, in love, and married. Mommy to Lucy born in March 2016. I am complete.
Hi all! I had the harmony test done at 10+4 and the results said girl. The nurse said it could be too soon to have picked up the Y but that's it's likely a girl and an ultrasound should confirm. Today, at 13 weeks we went for an ultrasound and I don't see any hoy parts!! :) what do you think? Too early or definitely a girl?