Hi, I've been on NR for about 5 months now, and when I've had it in, I've experienced bleeding starting prematurely, like before I take the ring out. It's usually pretty light and only a few days before I take it out, but this time I'm not supposed to take it out for over a week still and I'm having heavy bleeding now, with it in, as if I'm fully on my period. I feel like this shouldn't happen.. Is this normal? Why is this happening? Thank you!