Hello dear I understand your concern You have taken postpone 72 pill with in 23 hours of the sex. It is highly effective in preventing the pregnancy with in first 24 hours of the sex. It has 95-97% success rate. So it has just 1-3 failure rate. But next period may come earlier or delayed, inter menstrual bleeding and bleeding can be excessive as it cause hormonal imbalance. If period will delay by the more than 2 week from the normal expected period date then go for urine pregnancy test and or blood HCG to confirm the pregnancy. If pregnancy will be there then still you can terminate by using abortion pill under the supervision of the gynecologist. Meanwhile avoid stress, take healthy diet, drink plenty of water, maintian proper pelvic hygiene and do regular exercise Hope this may help you Best regards Dr. Sagar