does having a lot of..

Does being more sexually active lately delay my period? I usually don't have sex a lot but this past few weeks I have. We have been using a condom. We did make a mistake while having sex. The condom slipped off. I'm not sure when it did but I know he came. I took plan B like 5 hours later. I'm suppose to start my period Thursday. I don't have anything to worry about anything right?