Gender reveal party without a gender

So I went for my 15 week sneak peak on Tuesday so I planned my gender reveal on Saturday( tomorrow).

Well on Tuesday the tech finds that it’s a boy right away. We were super excited but then she starts looking alittle more. Come to find out it’s not a boy and she is not sure what it is due to positioning. So at first she saw the Umbilical cord then the baby started moving everywhere and the umbilical cord moved showing that what she saw wasn’t the boy parts.

Now I have my gender reveal tomorrow luckily it’s just family and they are super supportive and have turned it into a welcome baby party were we will guess the gender from the pictures and just have a fun time.

Has anyone else experienced this?