I had sex January 10th then took a Plan B later on in the day. I then got my period 13 days early on the 14th of Jan. I've since then had sex with a new partner on Jan 28 and I am now 6 days late for my period and pregnant. Is it 100% the second guy's child?
If you were only with him since your last period, then yes he is most likely the father.
Updated on February 16, 2018