What do you mean you started your normal period on the 13th? Was that during the placebo week? Was the 30th the placebo week? Are you on the placebo week now? The placebo week is when your "period" is supposed to happen.
As far as your body is concerned, once you had taken birth control for one full week, you were not "behind". Whenever the placebo week comes along, take them for seven days and then start a new pack, no matter what day of the week it is, or even if you're still bleeding.
Bleeding, especially if it's heavy like a normal period, means YOU ARE NOT PREGNANT. Where in the world would the embryo be!? You're bleeding it's whole world out through your vagina
That said, the only way you would be pregnant is if you had unprotected sex the week before you started, the first two days you started, the two days you missed, or 7 days after you started taking them again. Why? You need to take birth control pills correctly for one full week to be protected.