Okay so me an my bf have been together for almost two years we have unprotected sex somtimes but I got the implanon in december of 2011 and since then I've had weird periods and sometimes pain during intercourse. But yesterday we had unprotected sex and today I woke up with blood its more than spotting but less than a real period what's wrong with me this has happend before. I haven't hit my period since last month and its september is it bad? Please respond!