I Am Not Having My Periods After Taking Unwanted 72

I am not having my periods after taking unwanted 72 my date was in starting of this month i had my intimacy on consecutive 3 days but my bf is not sure dat whether he ejuculated a little or not. Am afraid cs its 4 th day n m not having my period..and there is a little amountnof white discharge is there..kindly tell me what to do n what is my state of pregnancy