I just started taking birth control (minastrin 24). I misunderstood how to start them and I started? them on a Wednesday and I didn't realize I still needed to take the first three. So I took a total of 21 active pills before the 4 placebo and then started the new pack on time. I had unprotected sex right after the placebo pills. What are the chances I could be pregnant? Am I protected since I had 21 pills in a row (even though it's a 24/4)?