... bleeding inbetween periods which is black and thick? I read that this can be old blood that is being emptyed from your cervix so it never worried me and had it a few day inbetween my periods but my last period started 21st of july and iv been bleeding black blood since! Iv always got cramps and there don't seem to be any signs of stopping is there somthing wrong? Its been 21 days of continual bleeding its not heavy but its not light either I have to ware a sanitry towel I can't get away with panty liners. What advice can you give me thanks.. I'm 21 by the way xx