Ok, I'm almost 17 and I haven't been sexually active for 3 months. But I have been having a really disgusting browish black discharge. And I also noticed that I kinda use the bathroom a little more than usual. But this discharge is CONSTANT, meaning NONstop. And I don't know what to do! I always have to have a tampon or pantyliner or my underwear is ruined. What's wrong with me? And what can I do to fix this?