I am 27 yrs. On 13 of this month got intimated and he gently rubbed the penis on the vagina after cleaning with a cotton cloth. As a precaution I took unwanted 72 within 32 hrs of such activity, that was my 14th day. And couldn't find any withdrawal bleeding yet. So very afraid of this, my upcoming period date is 27 with a cycle of 28 days. Is withdrawal bleeding necessary without having sex properly? please help me. Should I wait for the due period or just do something else?