I just started having sex. The first few times it hurt real bad. It's starting to hurt a little bit less, but it's still painful depending on what position. After the 4th time that I had sex, I bled. Ever since then I've bled a little bit after each time. On Friday after having sex I bled a little bit. The next day I was still bleeding on and off though. Today(Monday), I am still bleeding slightly, sometimes having to use a light tampon. At first the blood was and pink/red color but now it's looking more brown. Also, I have been feeling nauseous and dizzy the past few days. I'm not supposed to have my period until next week, which is when I take my "inactive" birth control pills. What could be wrong? (By the way, I just started taking birth control pills two months ago)