So confused!!! Please help!!

Betty • 👨‍👩‍👦+❤️=👨‍👦🤰🏻

So at 16 weeks I went to get a 3D sneak peek ultrasound. They said Girl. Since then we got a name, clothes, shoes, etc. So yesterday I went to my 20 week anatomy scan and they said boy! I am so confused now. I mean I can see it in the ultrasound but could there be a chance it’s the umbilical chord?? Share your boy’s ultrasound to compare! Has this happened to anyone else???