On a drunken night I made a very bad decision with an old partner and had unprotected anal sex with him on Oct 29, 2016. He has had a vasectomy and has followed up and given the all clear before this time. As extra backup I took the morning after pill 36 hours after our interaction.
My period was due Oct 30, but from taking the pill (I assume) it came on Nov 4-9. Afterwards my bf partner and I had unprotected regular sex on Nov 12. I am now 12 weeks pregnant, which means I likely ovulated around Nov 14.
Ia it possible for the drunken mess to be the father? Considering it was anal sex, he has had a vasectomy, I took the morning after pill, and I had a (late) period after?