Okay, so I don't remember much details but here we go. I was late starting my new pack of bc pills about 3-4 days. I took 2 every night until I got caught up. I believe after that I had unprotected sex with my boyfriend but we did use the pull out method. Around the 2 midweek on the pill I started noticing light brown discharge. It wasn't heavy but it lasted about a week. And now I have a missed period. Should I be worried???