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If you are regular in taking the birth control pills at a scheduled time daily and have not missed taking your birth control pills, you should have the continued protection from it (provided it was not the first pill pack use). If it was your first birth control pill pack use, you should consider using emergency contraception within 48-72 hours of the unprotected intercourse to prevent chances of pregnancy. Wait and watch for your periods/withdrawal bleeding. Visit your doctor/gynecologist for further assistance.
Take care.