Hi, I had my period on time a couple of week ago. It seemed like a normal period just a little lighter than usual. My period lasted the usual 5 days then ended. 5 days later I noticed I was spotting and then the next day I began to bleed as if I was on my period again. Throughout my history of having a period, the only time I bled twice in one month was after I had taken plan B. Otherwise my period has usually been every month and even occasionally every other month although since I have been sexually active is has been on a more regular schedule. My breasts have also been a little sore lately. My main concern though is why I am bleeding again. What could be wrong?