Could Delayed Periods Be Due To Gynecoid Tablets?

i have sex with my girlfreind unprotetd but i give her gyneocid that timee for risky pragncy avoidness but it dosent work her period date was 23 but the periods didnt have it with her ...please let me know about the medicne for the aburtion beuxe i am feeeling dout of pragncncy pleasee i have artortec but how can i usee it for her when it will work.............