Additional requirements: Short (I have a low cervix, though not extremely low--I cut my stem down to 1/8"), wide, no latex.
Someone suggested I use a much stiffer cup, such as Yuuki. The problem with that is the oh so soft Fleur cup already presses on my bowels and makes me need to poop. I can't imagine that a much stiffer cup would be comfortable at all. Also suggested was a softer cup with a prominent, stiff lip (like the Femmecup or UK Mooncup). Wouldn't that press just as much on my bowels as a cup with a stiff body, though?
The Femmycycle was also suggested because they have a low cervix option, but I don't know if that would solve my issue.