I have had an odd issue recently. Sometimes, when I go pee, there is a brownish mucus gunk that comes out of me. The best way I can describe this is as something like bloody snot, but more brown than blood and not as thick as snot. This started before the last time I had sex, at which point I had my nuva ring in. It also sticks to the ring or the cup. This does not always happen. I have started my period since this happened, and have had the brownish gunk since then - on my cup, for one thing. It washes off easily. I have had no pain associated with this, and I don't think I have a fever. It could be some sort of infection, but I'd expect a fever with an infection.
Any ideas on what this could be?