Am I the only one?!!

I had the mirena inserted 6 weeks post partum and have had it now for right at 9 months. I bled heavy to spotting for about 6 weeks after insertion. Since then, I have had my regular period every month until about 4 months ago. I started having a normal period which lasted approx. a week and then a week AFTER my period, I bleed this dark brown sometimes black looking blood for about a week. Has anyone else experienced this?? Should I be concerned??!! Tweet