Regards.

I Had Unprotected Sex with my girlfriend on her 2nd day of periods, I discharged in her, after that immediately I gave her a I-pill, due to which again within 4 days she got 1-day period which went on that same day, now its been a month she has not got her periods which were suppose to be on 10-12th of this month.I am worried now..

Please can you kindly clear my doubts

It is important to know that even with birth control, or emergency contraception, pregnancy can still be possible. They only reduce that possibility.

The timing of the sex, and that she used I-pill, make it unlikely that she is pregnant.

Periods are sometimes just off a bit.....even skipping a month can happen now and then. She should wait a little longer, and if still no period, have her try a pregnancy test, following the directions carefully, or she can see her doctor for a test.

Sorry, can not clear you doubts,

Of course the I pill can make a girl miss her period or be late. But it is not 100 percent effective, and the time to worry is before sex, not after and get a pill and then when she misses period.

But yes she can be pregnant, so now, you wait about another 2 week and have her do a pregnancy test