Ok thanks so much for your help
None of the details you've given suggest the guy in January is even a possibility.
No they didn't estimate the due date on the first scan as I was not going to go through with the pregnancy it was just to find out how far gone I was. But the lady did say he was conceived around valentines day which is feb 14th. That's very reassuring thank you. So there's really no chance it could be the guy in January?
And you got the November 9 estimated due date at the first scan? Sex in January and then a period, and a conception window of February 12-20 based on an early ultrasound, pretty much all rule out the January guy as dad.
I think my last period was around the 1st February but I can't really remember it may of been before. I had my first scan on the 4th April 2013 and they said that I was 8 weeks and 4 days. Then I had another one on 7th may 2013 and I was 13 weeks 4 days.
Your conception window is February 12-20, a conception calculator is as good as the information you feed into it. When was your last period? How early was your first ultrasound that gave you an estimated date of conception?