I had some spotting yesterday at 6+3 And they gave us an early scan. It showed an empty sac. They said it's likely our dates are wrong because the sac was measuring closer to 5 wks but we've been TTC for 4.5 yrs and know our dates. My last period was 10th March and and I positive ovulation tests on day 13 and 14. I'm so confused, could it still show up yet or is it all over? This counting from the last period vs from conception is making it hard to understand whether we should have been able to see it at 6+3 (from period) or not. Any experience or guidance please? I'm so upset.