Conception date help

Kathwrynn

Hi, has anyone calculated their conception date? I’m trying to get the most accurate date possible if anyone could help me 🥹. Currently 34+6. Due date is August 16. There is a small small chance my baby is not my partners and he is aware. We included another male in our bedroom on nov. 11, I found out I was pregnant Dec. 8. He did not “finish” in me but no protection was used as well as no protection was used with my partner at all. I don’t feel like it isn’t my partners but anxiety is growing the closer we get to the due date. It will be clear if the baby is my partners or not due to the other male being a different race. So, any luck with conception date and how accurate I can get it?