help! the nub is faint (out so I think it is the nub) and want gender opinions

I am new here and very curious about the nub theory. unfortunately my ultrasound tech refused to try guessing the babys gender. the baby is 13 weeks one day in the pic. all opinions about this faint nub is greatly appreciated. I dont know how to circle what part I think is the nub as the pic is from my phone

I don't see a nub sorry

No nub seen--not even a faint one.

:( I thought maybe that tail like thing sticking out from it's bottom.area was maybe it. but I'm new art this. ill just pry have to wait for the twenty week ultrasound. I have three girls amd am really hoping for that boy

No, that's not where a nub would be.  Best of luck and I hope you hear blue at your next scan!

only other pic :(