Hi Isis
Not sure why this is happening to you so i would ask the doctor or gyno just to check.
However one suggestion, I know that Depo does not agree with everyone and can cause irregular bleeding it may have something to do with this. My friend had constant bleeding so it was like she had a continuos period and had to stop taking it.
If the blood is dark it suggests that it is a menstrual bleeding rather than one caused by tearing or such like. Anyway I would check with the doctor. Best of luck
