Hello dear I understand you concern Confirmatory symptoms of the pregnancy is missed period. But you gf got the period so there is no pregnancy. Pregnancy is not possible when sex was done in safe phase of menstrual cycle. But take following advise: For pregnancy, penetrative sexual intercourse with or without ejaculation in the fertile phase of the cycle is require (10th to 20th day of period). Pull out method is not successful in preventing the pregnancy as precum enter in to vagina unknowingly in to the vagina before ejaculation and it contain sufficient sperm concentration require to become pregnant. So keep above thing in mind and use condom in future to prevent the unwanted pregnancy. Hope this may help you Contact further if follow up needed Dr. Sagar