It turns out I think the due date is wrong. I count from the ultrasoun…

It turns out I think the due date is wrong. I count from the ultrasound at 6 weeks, but the gynecologist is basing it on an ultrasound done at 12 weeks, which is slightly longer (a little more than by my cycle). She's sending me for a second scan in early December, and I'm arguing with her! I remember my first pregnancy, I did everything she said, but now I'm disputing it, like I've already been through this. It's almost there, we'll know who's growing in our belly by December 4th ?