I have had an early scan today, no embryo could be seen. Should have been 6 weeks based on last missed period, but now I am wondering if there's any chance this is wrong and my dates are wrong by a few days. I said no at the time, but now I am wondering if I could be some days off. My date of first missed period is 8 march, ovulation date was 25 march - if I go by the ovulation date, I think I could not be 6 weeks yet I think? Grateful if anyone could advise on the dates