Ok mommy's I have a question it is a little TMI. I am on the implant for birth control. May was a…

Ok mommy's I have a question it is a little TMI. I am on the implant for birth control. May was a year. I bleed for the whole year. Bleed for a week stop for a day then start over. Now i will go months without having one and when I do it is almost black and it smells really bad like something died. Has this happened to anyone?