Am i already prego

i had unprotected sex with my boyfriend two days before my period and the day i got my period. my period still came! After my period i had unprotected sex with my ex boyfriend but he did not cum inside me at all because i stopped the program. My period is officially over and i wanted to know how many days should i wait until too have sex with my boyfriend because we have been trying to have a baby for 2 months now because i just finished having a miscarriage n december