I’m having a girl? 50/50

The ultrasound tech said if she were to say 50/50 she would say i’m having a girl because all she seen was two lines and nothing in between. I want to be so happy and go shopping but I know I can’t do that just yet. ☹️ I’m starting to feel a bit depressed.. How often are the ultrasound techs wrong ? the top picture is between the legs. i’m 12 weeks 6 days