Pills

I am on my second pill pack currently, and I just have a couple questions.

When I started the last week of my 1st pill pack, my period started the day after which is what it’s supposed to do... and was very happy to see that it started when it was supposed to because I had just got off of Depo and it was all messed up.

Tomorrow, I am starting my last week of pills and that’s when my period is supposed to start too.

If I have sex without protection tonight, and he doesn’t pull out.. will I be protected from pregnancy if I take my pills regularly and consistently?

If not, when will I be protected from pregnancy on birth control?