Hello,
I had unprotected intercourse with my girl friend 2 weeks ago. Though I never ejaculated inside her, I am not sure if small amount of pre ejaculate dripped inside her or not, during the act. For safety, she took a contraceptive pill 'Postpone-72' within 48 hours of intercourse. Now, 2 weeks later she finds her periods to have advanced by 7 days. Though I know that contraceptive pill can change the onset of periods, her menstrual blood flow seems to have reduced. The amount of blood she finds now is way less than what she usually experiences. I would like to know if this is common or is a sign of pregnancy?