If my last period was October 7th an I had sex October 21 but it was after 12 so I don't know if you'd count it as the 22nd or not would that be the day that I actually concieved(got pregnant) because the online calculators are giving me a estimate of July 15th as a due date but I'm not forsure if that's really acurate or not or would my due date be in August sometime with guy#1he did not in me he did pullout 16-17 days later (November 6th) I had bleeding that lasted a few days so I just thought it was my period an that was the time it was due pretty much after that me an my husband got back together after a fight an we had sex November 5th an all after my period stopped through the month of November who could be the dad? My due date from my obgyn is August 12 had my first ultra sound at 13 weeks 6 days I'm in a state of mind where I'm obesseing over reaserching about this its all I spend my time doing

Calculating conception or birth dates is an inexact science. The likelihood is the October 21-22 sex, but you will have to wait until birth and can do a paternity test to be sure.

Interesting, from your LMP I calculate your due date as July 14.

As far as who the father is? You will have to wait until the baby is born to do a paternity test.

All of the calculators and all of the ovulation calculators and all of the dates for being due, and all of the ultrasound age estimates are guesses good estimated guesses but can easily be off a week or two.

There is no way to know or establish paternity that is safe, till the baby is born, So be obsessed with something else, since you can estimate till the baby is born and nothing will tell you till then