Hi i s this right to have sex during periods

Patient: Hii s this right to have sex during periods ? Itx been 4 months to our wedding n m not pregnant. .this month i had periods on 24 the first 2 days i get normal bleeding but third day there was no bleeding js brownish spot were there n nothing more…4th day again no periods so we had sex at 4th day n after sexual intercourse lyk after half n hour or 45 minutes some blood came out from my vagina lyk jst 2 3 drops…m scared now because i have heard that having sex during periods make you unable to give birth to a baby.but as i said ,befor having sex there was no bleeding jus had 2 3 drops of blood after sex n nothing after that…

Doctor: