Could The Last Week Of Menstruation Be Safe?

Suppose, one unfortunately had an unprotected sex on 14th day of period due to accidental failure of condom. Immdediately, she took an unwanted 72 tablet. In such a cirmustance, what will be the behaviour of safer days (22nd days onwards). I mean to say, will 22nd day onwards still be considered as safer days till commencing of the next period?