Confirmation of pregnancy & abortion

Patient: Sir i had sex with my wife on 1st february,and had given her an unwanted 72 1hour after sex.she had her last periods on jan 23 to 28 but on feb 9 she had a light menstrual bleeding.she has a one month cycle.Her next period was to be on 22 to 24 feb.What are the chances that she is pregnant & if she is,how early can she have an abortion using abortion pills.she is 23years of age.