I Had Sex On March 25 With Protection And Then

I had sex on march 25 with protection and then without but no ejaculation.. (11 days before my next period) I then again had sex on march 26 which was fully unprotected (10 days before my next period).. I took postinor 2 in the morning (march 27)... Am I protected from pregnancy? I am scared for some reason because my period is supposed to come today but no sign yet.