I had sex with a girl (who has her boyfriend btw) april 9, 2015. after a few months i heard she was pregnant. she then told me the baby cannot be mine when doctors did the calculation. the baby was suposedly due january 25th, 2016 but was born a week early which was january 19th, 2016. she did not mention anything until yesterday she made a "joke" about the baby looking like me. What are the possibilities that that baby indeed could be mine? i used some online calculator which gives result that if it was indeed conceived in the period of april 9, it should have been born between dec 31 and jan 4. But everybody im asking is telling me that it should have been born in january and could be mine. the girl is still with her boyfriend but keeps making the "joke" the baby is looks like me.