"Plan B": Taking "Plan B" types of pills 36 hours after unprotected sex may work, but it is not certain. This kind of medication "works" by making the lining of the womb not "hospitable" for implantation of the fertilized egg. It may have been taken too late to create this effect. so get a serum HCG test if your period is at all delayed to know for certain.
Answered 10/23/2014
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