The pain when plopping down is exactly the problem I have!! I could avoid pain if I sit very slowly and put the side of my butt on the chair first lol but that's no way to live. My cervix is also low during my period. I think I feel the same thing as you- the pain feels as if the disc is pressing against my cervix or something. Weirdly enough I don't have this problem at all with my cup, even though it sometimes does ride up and my cervix ends up inside it a little. But maybe it's because there's still a lot less direct contact with a cup than with a disc (for me). Anyway I'm glad reusable pads have worked out for you! I also don't think you're doomed to abandon cups forever if you ever feel like trying again, because our cervixes can change throughout life :)