Gender Help!

Au

So at 12 weeks I got an ultrasound, she told me it's a Boy. I asked around an people agreed. Now today at my 20 week ultrasound the tech is saying Girl! I asked her if she was sure cause they told me at 12 weeks baby was a boy. She check many time's different ways, and she kept coming to a girl. What do you ladies think? I ask another group majority say girl but still some say boy. I'll post ultrasounds in comments.

P.S. I go back next week to check spine and to check gender again!