I used donor Sperm that I ordered online while I’m a relationship and now I have no idea who the father is. 50% chance of either. How do I get a NIPP done. I just feel so guilty I lost a baby a few months before and my partner said he didn’t want a baby and I was desperate and not in a good mind set then...

I got a positive ovulation on a Friday, peak on Saturday I inserted it Saturday afternoon. Then on Monday I had sex with partner and he fully came in me. He usually NEVER does that... I guess the question is is there any chance of the child being his since we had sex 2 days after my first positive opk maybe 3 ???