I have had a ultrasound to say that I am approximately 7 weeks and 5 days pregnant. I have not had a period for over a year so could not tell them when my last cycle was. I am wondering, are they saying that I would have had sex 7 weeks and 5 days ago? She was a bit confusing as she mentioned taking into consideration a 7-10 day cycle. So would that mean the date of having sex would have been around 6 weeks ago? Very confusing.