Hallow Dear, You are right; the day of your sexual play was very near to the day of egg release; hence you had sex in the fertile window. In fact to cover this unprotected intercourse, you should have taken some emergency post coital contraceptive pills within 72 hours of the intercourse. However, you had consumed 4 pills of Nordette, which very much is near the dose of post coital pills. There was no necessity to repeat the pills after wards for two times. You are well protected from the pregnancy due to this particular intercourse. However, due to so many pills you have taken, your following menses will be delayed by more than a week or so. You need not be concerned about it. Still if you are stressed with the possibility of the pregnancy, you may perform pregnancy test on your overnight morning first urine sample a week after the missed period; earlier the test may report false negative results. Also due to so many pills, you may experience increased stomach acidity, nausea and vomiting. Some proton pump inhibitor antacid like pantoprazole will give you relief from these symptoms. Henceforth, please make it a point to keep some post coital emergency pills handy for such incidences. I hope you are happy with this advice now. Dr. Nishikant Shrotri