I had sex with two different people 12 days apart. 11/25/2019 and 12/7/2019-12/13/2019. i found out 1/09/2020 that i was 6 weeks and 6 days. who could be there the father?

The husband, but...: To find the estimated conception date, one can count backwards 4 weeks and 6 days from 1/9/2020, if the baby fetus was 6 weeks and 6 days. The standard way of counting is: conception is 2 weeks AFTER the official start of the pregnancy. That means if pregnancy officially started 6 weeks ago, conception was 4 weeks ago. All dates are estimates, plus or minus one week. Yes, all dates are estimates.