Is It Normal To Have A Delayed Period After Intercourse?

I've recently had sex for the first time, June 3rd, about a week before my period. We used protection and the condom didn't break. I had sex the 3rd, 5th, and 7th all protected and I was supposed to get my period the 11th but now it is 4 days late. I've had slight period cramps but still nothing. I'm VERY worried. Is it normal to have a delayed period after sex for the first time?