Hi Doctor Me N My Girlfriend Had Unprotected Sex But

Hi doctor me n my girlfriend had unprotected sex but intercorse was not done it was just rubbing penis on her vegina. But she had ipill in 20 hrs after sex to avoide the chances of pregnancy. But her expected period date was 19 and on same day she took ipill now its 6 days delayed its 25th aug but still she didnt get her period . I m really concerned abt that .how soon she will get her period .