I Have A Query. Please Help Me Through This By

I have a query. Please help me through this by answering it. My girlfriend and I had protected sex 5 days before her period start date(11 Nov). Then again a day before her period start date we had unprotected sex for the first time but I did not ejaculate into her. I pulled out well in time. But just to be safe she took i pill after 1 hour. Her periods occur regularly except when we have sex 3-4 days before her period, it gets delayed by few days. Is there chances of pregnancy? or is it that her periods now will be delayed due to the intake of i pill? Please shed some light on this issue and help us by providing good information on this. I have read many things on internet and its quite disturbing. Please please help us