This is why I adjusted my "first day of your last period" to an entire 10 days later than it actually was. Because we only had unprotected sex once, and I knew exactly when, and I knew when I got a positive test, and I've been pregnant a bajillion times before- I KNEW I didn't ovulate 14 days after (or I wouldn't have gotten pregnant at all!!!) In fact, I've been going along based on a LMP of December 18th for so long that sometimes *I* forget it was actually December 8th and technically my EDD "should" be 9/14 instead. I also had several very early ultrasounds that agreed with my estimation.
Sooo....I'm really sure about my date and my bebe shouldn't be late. But she probably will be anyway.