Gender thoughts

Is it just me or does anyone else think there baby will come out a different gender to what was told in the gender scan? It keeps playing on my mind. I was going to get a 3D scan just too confirm I'm having a girl again, it was a surprise because they're aren't a lot of girls in my family. But I only have 7weeks left and I don't want too ruin the surprise of her facial features and what she looks like. Please tell me I'm not the only one who's doing this, and that I'm just being silly!