Suggest Remedy For Delay In Periods

i had sex with my gf while she was having her 2nd day of period.Next day she took unwanted72, in the evning she told me that her period were stoped after unwanted72. Afret that she told me little amount bleeding for next 07 days. Now 29 days from starting of last period has completed & she has not being period. Normally she has cycle of 24 days. is she safe???