Conception date ??

As of today 4/21/20 I am 14 weeks and 4 days would this mean I conceived 1/10/20 me and my fiancé have been trying to figure out our conception date for the longest now and that’s what makes sense to do is count back , I thought I was farther along because my first day of my last period was 12/27/19 but my baby is measuring at 14 w 4 days can someone help me out lol ?