Boy or girl?

Kiersten

Measuring 12weeks 2days. I have 2 boys already and got an ultrasound today and then the tech went down we seen a potty shot and it looked like a boy. (One straight line just popping up through the legs) I asked her if I was crazy with seeing what I saw and she said it’s too early to say for sure but she is leaning more towards it being a boy. I wanted to know if anyone knows nub theory or can tell from the pictures I was given today if it’s boy or girl? Thanks!