I just switched over to a Diva cup after using a mooncup for a few months and it's leaking a lot, but only with the thick brown discharge that I used to only get on my last few days of my period. When I pour it out, there are clumps of the stuff on the outer edges, and the "normal" blood is all inside the cup. So what's going on? I really like the Diva cup otherwise, especially because I have a really heavy bloodflow. My cervix is also pretty high and I don't think that's the problem. This happened when I was using the mooncup too, but not as badly as it is now.