Period Late but on Aviane BCP

I had been off of my bcp for a few months and then started back up midcycle (a week and a half before my expected period). I had completed the first week of pills before I became sexually active again. My partner uses a condom to finish, but not at the beginning. I am currently 11 days late on my period and starting to freak out a little bit. I have been having slight acne and I never get acne but it could be from stress or starting my bcp again. I have read that because I didn't wait until my period to start my bcp again, I am essentially going against my body's natural cycle and that could be why my period hasn't happened yet. I have three pills left until my placebos start, and am hoping my period comes then. Any thoughts?