I'm on mirena birth control, I've had it for about a year now and have spotting occasionally. My regular period has been dark brown. But recently (the past 2 months) I have had very dark brown DISCHARGE in between periods that, when hits the water, looks like a bunch of flakes floating around. I have been diagnosed with HPV last year as well but have no known symptoms. I'm wondering if the dark brown discharge is caused by my HPV, or If I have another sort of infection, please give me some sort of answer. Thankyou.