Period 4 days late, problems withCM

My period is 4 days late.. For the first two day I had super watery CM like so watery I had to change my underwear, now for the past two day my CM has been really thick and long , almost like heavy clumps of mucus! And some clumps have spots of blood in them.. I've never had this before ...Idk what this is ? Has anyone had this?