marelisrs -
Generally, the instructions with the pill say that you will be protected only after taking them consecutively for 7 days, every day and on time. As the pp mentioned, though, ask your doctor to be sure. Also, the last week of the pills is your period week. You don't necessarily have to take them that week since these pills are hormone-free, but it's a good idea to take them anyway to help you get into the habit of taking a pill every day. I always took them when I was on the pill.