I had a positive pregnancy test on may 4 2010. When I went to see the doctor I could not recall when my LMP was. They scheduled an ultrasound which calculated my due date at January 14 2011. I would like to know if this due date makes sense for when I had the positive test and when I would have conceived. Please help!

If your due date is 1/14/11, the most likely date of your lmp was April 7, you most likely conceived on or about April 21.

When you took the hpt has nothing to do with due dates.