gender ultrasound.. what do y'all think?

Katie
What do you guys think? I got told this is a girl, and though girl is defietenly what I wanted, I'm not completely convinced. Though this is my first baby, & I have seen a lot of boy ultrasounds and they look nothing like this. I do see the three lines, but why is it bulged out? Swollen vagina? I go tomorrow to my doctor again to get another ultrasound and anatomy scan.