I went and got my scan today (10-4) at what I calculated as 6w6d. Dr said it is measuring at 6w2d. I just don’t see how that’s possible and now I worry something is wrong. I am 100% sure I ovulated in August 31st (positive opk 29th, 30th, 31st am, severe ovulation pain 31st in the afternoon, negative opk by 31st pm and 9-1 am). Lmp 8-18. Bd 8-29, 8-30, 8-31 and not for a week after. Positive hpt 9-10, 9-11, 9-12, which is what I calculated at 10-12dpo. If what she’s saying is correct, we found out I was pregnant at 3 weeks with positive hpts at 6-8dpo. That seems unlikely to me! Any insight?