I Had Sex With My Partner On 10th March, But

I had sex with my partner on 10th March, but the condom tore, I could not understand and i ejaculated inside. I gave my partner pills(Unwanted 72) after 10 hours. We had protected sex again after 6-7 hours. 18th March was the expected date for her periods. But its 19th March and she still did not have her periods. What should I do? Is there any chance of pregnancy? She did not vomit after taking the pill. Please let me know as fast as possible.