What Might Be The Reason For Dark Almost Black Discharge From Vagina?

Hi, I have a question. I got my period on the first of December, everything was normal. It stopped on the fifth of December. Two weeks later I started to get clear mucus like discharge. Then I got light brown discharge, a week later my discharge turned dark brown. Soon after that it started to come out kind of black. Now all there is is blood. I want to know what could be going on with me. Please help, thanks.