Weird feeling about gender

This is from 16 weeks we had our eyes closed and she put it in an envelope so we didn't get to see on the screen and at 18 weeks my doctor said she couldn't tell because the legs were crossed and the whole time I've been pregnant I've had this strong feeling it's a girl, I feel like I'm going to go to my 26 week 3d and he's going to be a girl and I also feel like I see three lines in this and it doesn't look like other people's boy sonograms, what do you think?