Ultrasound gender prediction wrong?

Marika • Momma bear to two little Cubs
So yesterday at 19 weeks I went in for my anatomy scan, I've had two previous ultrasounds, one at 14 weeks and one at 18 weeks and both said boy, so needless to say my husband and I were in complete shock when the tech told us we are having a girl... I'm hesitant to believe anything right now because when they showed us the "boy" ultrasound she showed me cord and boy parts but this u/s tech said she's 99% sure it's a girl. Has anyone had this happen? Here is the "girl" shot and the earlier boy shot