wrong gender prediction? Opinions please!

Al

What are the chances the ultrasound tech got the gender wrong?? Baby wasn't being very cooperative so the ultrasound tech was having a really hard time getting a good look at any of her anatomy so now I'm nervous. does this definitely look like a girl? I've had such a strong feeling it was a boy this whole pregnancy so I was really surprised when we found out it's actually a girl. I'm 19 weeks 6days.