The way you described your bleeding, is the usual thing I go through on my periods 
Ever since I got an IUD, my periods have been as described, lots of blood in the beginning and then dark red (almost brown) mucus at the end. When I got my IUD, I was far from NBEing, I was breasfeeding my son and not thinking about the future (saggy breasts) :O Three years later I decided to take action; in other words, herbs had nothing to do with the way I am bleeding.
Ever since I got an IUD, my periods have been as described, lots of blood in the beginning and then dark red (almost brown) mucus at the end. When I got my IUD, I was far from NBEing, I was breasfeeding my son and not thinking about the future (saggy breasts) :O Three years later I decided to take action; in other words, herbs had nothing to do with the way I am bleeding.