My period has been pretty regular. I got my period as expected for this month. However, after about 8days after getting done with my period, I started bleeding again. It's not as heavy as when I'm on my period and they are black blood. What could be the cause of this or what does this mean? I used to be on birth control pills and started taking them again this past month but this has never happened to me for as long as I remember being on pills. ? ! ? !