I had a one night stand while having my period but he did not *** in me, but before hand I had sex a couple of days before with my partner and after my period had finished. I would just like to know when I would have conceived because I am now 12 weeks pregnant.

Unfortunately you are going to have to wait until the baby is born for a DNA test to be performed. The dates in question are too close together to be able to form even an educated guess.

Estimated conception dates are just that estimated, they are give or take a week or two at the best, there is no way at all possible to tell who it is within a couple days.

1. There is plenty of fluids in early fluids so the one night stand has a good chance

Considering sperm can live inside of a woman's body for up to 5+ days, it's impossible to tell who the father is without a DNA test.

Thanks a lot guys. Kind of helps me now.