I had sex 14 days before my period is due what are the chances of pregnancy ?

Use Plan B...: 14 days prior to your period is the time that most women ovulate (which is a good time to get pregnant). Your chance of getting pregnant is about 1 in 4. You can decrease your risk by taking Plan B. Its most effective if used within 72 hours of intercourse but does decrease risk up to 5 days after intercourse. There are other prescription options that work up to 5 days from intercourse.