So confused!!

Samantha

These were at 13 weeks 1 day, the ultrasound tech said she did not see anything between the babies legs and she got a good angle and said based on the dangle of the angle(nub theory) she believes baby is a girl but to obviously not go out buying stuff yet, however these two pictures she printed I swear shows there is a penis! Could it be the umbilical cord?? She was a student ultrasound tech