Hello.I'm On Belara Birth Control Pills And These Are The

Hello.I'm on Belara birth control pills and these are the first BC pills I'm using.I started taking them on the third day of my period (which was the 26.of December )and my period lasted for five days.I had sex on the 29.of December(one day after my period ende),but on the packaging it says that i'm fully protected after seven days.We didn't use a condom and he didn't come.Could I be pregnant?