They work like a diaphragm, right? Well, I could use a diaphragm well enough, until after the birth of my second child (I had C sections, not sure that matters). Anyway, something happened and my cervix changed positions. Next time I tried to use one, it got stuck behind the pelvic bone and I couldn't grab it. It came out in the emergency room, after a huge amount of trouble (and no small feelings of trauma on my part). 12 years later (this was just this year), I tried to get fitted with a diaphragm again, only to have the same problem. The nurse practitioner managed to get the fitting-model out, but refused to prescribe one, obviously, saying that my anatomy wasn't right for it.
I don't want to have to go to the E.D. to get my Instead cup removed, particularly since I don't have health insurance right now. But if they're more flexible than a diaphragm, or different enough, maybe it would be okay to use one. Anybody have any experience-based advice, or professional-based (such as being a midwife, doctor or nurse)?
One more question... has anyone used a sea sponge during sex? Perhaps that would be safer for me. The "sex tampons" look interesting, but they also just look like sponges.