Side effect with implanon

Katie
I've had the implanon birth control implant for a year and a half and in the last 6 months or more after my period (which are so irregular like every 3 months and then 2 in one month) but I still think it's worth it! But after my periods recently I've had like a "dirty discharge" it looks like dark brown/dried blood but fresh out... I know it sounds disgusting sorry but I'm wondering if any body else has had this??