Okay I had intercourse with one guy on October 2, 2011, a week later I had a period than October 28-November 5 I had a period. December 6,2011 I found out I was pregnant, on December 29,2011 I had a Sonogram and they said the due date was August 9,2012. Today January 15,2012 I am 10 weeks & 2 days. Does this mean that I conceived in October?

Hi Alyssa005... welcome to AMHD,

With a due date of August 9 and being around 10 weeks, you most likely conceived in November. If you became pregnant from the October 2 encounter, you would be further along.

Sometimes, when there has been more than one possible father, it can be too close to call, but with these dates it would be off by several weeks. While sonograms are not an exact science, there would be too much developmental growth in baby to make such a mistake in dating the pregnancy.