OK I am 36 weeks pregnant about to be 37. I had sex on April 27th and may 12. I got my first ultrasound on July 16 which place me at ten week. It said my due date is February 4th, LMP is April 30th, and conception date at may 14th. What I'm confused about is that I know my LMP was before April 30th and I also have irregular periods. Why I'm woryed is because I had intercourse with two guys

There is no way to tell when you actually conceived. Unfortunately you are going to have to have a paternity test done after the baby is born.