Hallow Dear, Nordette is an oral contraceptive Pill. Nordette tablets contain two hormones, levonorgestrel and ethinyloestradiol, which prevent pregnancy if taken correctly. These pills need to be taken regularly from the second day of the menses for preventing the pregnancy. These pills are not emergency contraceptive pills and do not prevent pregnancy if taken after unprotected sex. In fact if you had your menses on September 2, then September 20 does fall in your fertile window. You should have taken some emergency post coital contraceptive pill within 72 hours of the unprotected sex. No medicine will prevent the pregnancy 11 days after the unprotected sex. Now, you have got following options for not becoming a mother at this stage: 1. Get your pregnancy status detected. For that, wait for your menses to appear. If they appear, you are not pregnant. If you miss a period, perform pregnancy test on the overnight morning first urine sample a week after missed period; earlier the test may report false negative. Alternatively you may opt for Beta hCG test on your blood 10 days after unprotected intercourse. 2. If you are pregnant and you do not want to continue this pregnancy, you may terminate this pregnancy by medicines safely up to 9 weeks of gestation. These medicines should be taken by an Obstetrician s advise only. Once these medicines are taken, you should not change the decision of abortion as they cause developmental abnormalities in the baby. Alternatively, you may opt for surgical suction evacuation of the uterine cavity by MVA or so. To avoid such stressful situations in future in your sexual life, please adopt some reliable and regular contraceptive method like condom, oral contraceptive pills or intrauterine device. I hope this helps you today. Dr. Nishikant Shrotri