hi moms.i am confused, my last menstuation period started on the 5th of…

hi moms.i am confused, my last menstuation period started on the 5th of september.i then sleep 2 with different men simultaneously , the first one I slept with on the 12th n 13th september and slept with the other on the 21st.according to ovulation calculator I ovulated from the 14th to 19th September. please can you please help who might be fathered my pregnancy