the date of my last menstural cycle was 09/18/2009 i had unprotected sex 10/06/2009 but he did pull out to ejaculate. i had unprotected sex again with a different partner on 10/09/2009 but we stopped in the act (he did not ejaculate at all). Will a cenception date help me to determine who the father is? And what date do you think i conceived?