Nub theory

I posted my ultrasound pictures on a nub theory group on Facebook and got mostly “early girl or girl” answers. I just paid someone $20 to scan and analyze and she said boy? Can anyone do the nub theory? The tech said the nub is parallel to the spine which means girl. I really had my hopes up. I already have two boys and this is the last baby 😥😓 12 weeks 4 days