Hello dear,I understand your concern.In my opinion pregnancy occurs only if the semen is ejaculated on or around or inside the vagina during the fertile period.Just touching the penis and then vagina will not result in pregnancy.Unwanted 72 was not needed.But as you have taken it it might effect the coming period timing or bleeding.The period might come early or late or irregular bleeding or heavy bleeding might occur sometimes.Dont worry.Practice safe sex with condom. Best regards...Dr.srilatha