Hi, I don’t know if anyone can advise. I went for an early dating scan yesterday as in have very irregular periods. I had a clear blue 3 + two weeks ago today (making me 6.6 yesterday). He measured the crl at 4.1mm and said I’m about 6 weeks ??. That like nearly a week behind. Should I be concerned?. He could see the feral pol, sac and flickering heartbeat. Just to add it wasn’t transvaginal which I was a little shocked at so I’m not sure it was that clear. Could he of measured wrong ? . Thanks so much , my anxiety is through the roof xx