Hello, I have gone through your query and sorry to say, you have messed up your hormone balance and this is the result. The first instance of unprotected intercourse did not need any emergency contraceptive in the first place, since it happened during the safe period, presuming you have regular 28-30 day cycles. Also, the week prior to the expected date of menstruation is also safe as ovulation occurs two weeks prior to the onset of the next period. Yet, in the current scenario, owing to the intake of the emergency contraceptive, the hormone milieu is disrupted and hence ovulation may have been delayed. This may have made the second act unsafe and probably resulted in conception. Please get a blood test for pregnancy to confirm followed by a trans-vaginal sonogram to plan further management. Hope this helps.