What Causes Delayed Period With BC Pill?

I am currently on birth control pills..however this past month I made the mistake of missing the pill one day..so i took it the following day along with that day's pill. I also have been taking my pill a few hours later than the time I usually plan on taking it. And, to top it all off I noticed I forgot to take the last pill in my packet (a saturday.) I did not have sex that day (the last saturday), but I did have sex a few times throughout the month. I am really nervous because I am now 5 days into the sugar pills and I still have not gotten my period. I've only seen my gyn. once, but she said that taking the pill a few hours off the scheduled time is not that big of a deal. Are my chances of being pregnant high? And is there any way that I can speed up the process of getting my period sooner? I have been exercising a little the past week and eating healthier, could that delay my period?