I am 19 years old and have been on birth control for 4 months now and have taken it consistently (never missed and always at the same time each day). I had sex on the second day of my previous period and my period really lightened up. Since I don’t remember if my sexual partner used a condom, I was very paranoid and took Plan B as a backup to my birth control pills. The more research I do, the more I know that I didn’t need to take Plan B. Even so, I am still scared that I am pregnant. My cycles are normally 28 days long and it is now 3 days until my next period is due and I had light brown discharge. What does that mean? Could I be pregnant?