Frustrated with due date?

Kaity
When they did my dating ultrasound at the beginning of my pregnancy, I told them there was no way I was only 5 weeks along, since that would mean I would have gotten the positive (hard! Positive!) 3 days after ovulating. I told them I knew specifically the day we had sex. Well baby measured at this so.... ok whatever. 
Fast forward to last Thursday when we had our anatomy scan.  Baby is measuring bigger, by 9 days (which by the way fits the timeline exactly). My dr says that it's no big deal that the baby is measuring when I ovulated, that they're not going to move my due date up. While I get 9 days isn't a huge deal, it kinda is. At two weeks (14 days) past your due date, they induce labor. 
I'm just frustrated. Anyone have anything like this happen?