Alright this is a little difficult my ex cheated on me on October 11 or the 17th 2017. We had intercourse 24,26,and the 30th of October. She is now pregnant and is now 26 weeks pregnant I already took a paternity test waiting on the result. Her last LMP from what she said was October 22 but when she went for her ultrasound it place it on the 26th. I am still wondering when she would have obvulated or conceived