Hi, I appreciate your concerns. When was your girl friend s last period/ Was she in the unsafe period of her cycle? You have done the right thing by giving unwanted 72 at the earliest to avoid pregnancy. Used in this way unwanted 72 is 95% effective. If her period is delayed by more than a week, get a pregnancy test done (there is a very small possibility of pregnancy due to method failure). To avoid such unnecessary stress I advise her to consult her doctor and start regular contraception like hormonal contraception or have an intrauterine devise fitted as they are more effective than unwanted 72 in preventing pregnancy. I hope I have answered to your satisfaction. If you have any further queries do contact me through healthcare magic.