Pregnant on the pill?

Patient: I was taking the pill and have now stopped because my partner is away. I was still on the pill for about 2 weeks after he left and when I got up to my sugar pills I stopped. I had my period then but now I am a week late for my next one. I know that I am probably being a little paranoid but I just thought I’d ask if it was possible that the period was just due to the hormone change from the pill and that I could be pregnant? Am I just being silly?