For the past 2 days I been having very light bleeding only when I wipe I start my period anywhere from the 3-5 of the month every month I still haven't had it like I always do its very light pinkish red when I wipe my back was hurting lastnight with a cramp like sharp pain on the right bottom side it last off and on through the night does anyone know what could be wrong with me? I took 2 test to see if I could be pregnant both came back negative! Pleas help thanks