Two different gender opinions on 13 week ultrasound

So, I had an ultrasound done at 13 weeks and the potty shot revealed a very obvious boy. However it did look a little odd. It was very long and black in the center, so it was literally like the outline of a penis and black in the middle on the ultrasound like it was hollow. It also had a huge line coming out if it. It just looked super odd, but the tech told me she was still 90% sure it was a boy.

However, when my OB received the report and saw the picture, she told me it was the umbilical cord and she was pretty sure it’s a girl.

I am literally so confused now!! I was supposed to have a gender determination ultrasound in two weeks, but it got cancelled due to COVID. Now I have to wait until March! The anticipation it getting to me lol.

Has this ever happened to anyone? Anyone know if the umbilical cord to could be mistaken for a boy? I thought they could tell the difference.