Last week, i had protected sex. this week i had unprotected after which i took an i-pill within 12 hours of it. i had also delayed my period by taking regestrone [ 2 tablets every six hours]. my period date is 3 jan. is there any chance of pregnancy?

Pregnancy is unlikely but it is not feasible to give you the odds. If you miss your period by 4-5 days do a home pregnancy test. If the result is negative repeat the test in 4-5 days. Use first morning urine and follow instructions for the test carefully. If you do not wish to be pregnant, use contraception all the time, every time. You may consider implanted contraceptive, or IUD.