So, I am only 17 years old. I had an unprotected sex while I'm on my period with my boyfriend. Then after 2 weeks, I had this dark brown thingy down there for a day which freaks me out and then later it turned to red looking like i'm on my period. If it's a period, why did I get it so early? I read somewhere else that it could be cleaning out and it's just an old blood. Also I heard about the ovulation thing. I am not sure. I am really worried that what if I am pregnant? I don't know who else to ask. I'm scared.