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You should always take these pills only under doctor's supervision. Sometimes abortion is not complete with medical methods. To rule out pregnancy
get an ultrasound
done. if ultrasound rules out pregnancy ,you can take emergency contraceptive
for last episode of unprotected intercourse
. Emergency contraceptive is effective if it is taken within 72hrs of unprotected intercourse. Consult a gynecologist before thing become complicated for you. Take care.