I am 23, I have been on the NuvaRing for over a year now. Before ...

I am 23, I have been on the NuvaRing for over a year now. Before the NuvaRing I had tried practically every other kind of birth control out there: Different kinds of pills, the patch, Depo shot, even an IUC (Mirena). All of these didn't work, they each came with their own horrible side effects. Like I said before, I have been on the NuvaRing for over a year now and things have been going great. No problems. Until a few days ago... I am supposed to take out the ring and have my period next week. But for the last 4 days I have been brown bleeding, with pieces of uterine lining! I have also been having cramps, and feel SUPER tired, like i was having my period. But i still have the ring in! I was so happy with the ring! I don't want to have problems and have to, once again, try to find a BC that will work w/o horrible side effects! I don't want to go to my GYN because i know what she will say "Just wait a couple months and see what happens". I know i shouldn't be freaking out about this but BC has been such a huge problem for me and i thought i had finally found one that worked! Has anyone else had brown bleeding BEFORE their period??