I had sex with my boyfriend on 25th march and the condom ripped off. I took I-pill(ECP) 22 hours later. I didn't face much side effects. My period was expected on 28th march. By how many days it is likely to get postponed? Are there any chances of me getting pregnant?

The I pill is not 100 percent effective, so yes there is a chance. The pill can cause you to even miss the next period.

Any time there is penile insertion there is the risk of pregnancy. You can minimize the risk but not eliminate it.

The only way to tell is to wait approx two weeks after you miss your period to take a pregnancy test.