I'm not convinced it's a girl!

Nancy
I had a ultrasound at 15+6 and the tech couldn't see the gender because my baby had u.cord was around baby's private couldn't see much but told me looks like a girl . I'm so confused because she didn't seem convised either. Have you ladies ever gotten a ultrasound around 15w and was told a gender and then at 20 w was told another ????