Ill never forget my son was laying with his legs over his head he wanted us to stop calling him a girl lol since hubby and i said girl from day 1 since we have a boy already. We still had to go back though because they couldnt measure everything since he was folded in half lol. Baby ##3 better be a girl this time!
If it's a girl, you can see the three lines, if it's a boy you can see their balls.
Had all three of my pregnancies gender reveal done 16-18 weeks & they haven't been wrong yet! Lol best of luck: -)
Get another one just to be sure...that's what i did...
Always double check,thats your right to know the accurate sex of your child.
I would just wait till next ultrasound and have it cconfirmed, both my boys no doubt at all all you saw was balls lol