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Do you mean to say that the emergency contraceptive pill completely dissolved in your mouth? Or did you swallow it? If you have swallowed it, then it should work in preventing pregnancy (if taken within 48-72 hours of unprotected intercourse). If the pill has worked, you should get withdrawal bleeding after about 5-7 days of taking the emergency contraception.
Wait and watch for your periods to start. If they do not start, or if you have abnormal periods, then chances of pregnancy cannot be ruled out. Look out for development of any other new symptoms suggestive of early pregnancy.
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