How To Use The Ipill?

I am sameena. I am 39 years old. Today I had sex with my husband. We use mood condom. After having sexual intercourse we find that the condom had broken. Today is my 14th of cycle. I may be pregnant. We already had a son. We don t want any more. So If I use I-pill is it OK. How to use and what is the rate of IPill. Can you please advise me as I am very tensed. Regards Sameena