Late period anxiety

So I had my period before finals in December and didn't have sex after that.  However me being forgetful me managed to miss 8 pills of my birth control over the entire pack (like I would forget about it for a few days and then pick it back up).  I haven't had unprotected sex since before my period in December.   
I had all of the symptoms I normally have with my period but the actual bleeding.  I began a new diet and started rigorously working out 6/7 days a week at the start of the new year and my period was due the second week of January.  Could missing my pills and the new diet and working out make me miss a period?