I am now 19 weeks pregnant, as determined by my ultrasound. I am confused about who the father of my child is. It was estimated that I ovulated on 10/24/10. I had sex with one person on 10/23 or 10/24 and with another man on 10/27. Is there anyway to possibly tell the exact date conception or are the dates too close?

The only way to identify the father is to wait for the child to be born and then have DNA tests conducted. Anything else is guessing.

Those dates are too close to tell. You're going ot have to wait until the baby is born and do a cheek swab. Sorry, good luck!