Hey doc, the cramps I am taking about aren't the usual 'first two days in bed on Darvocet and Naprosyn' kind of cramps (although I DO get those because I have endometriosis).

These are acute cramps from the tampon that instantly go away when I remove the little bugger. I think that it is a muscle contraction of sorts, like the pelvic floor muscles just can't handle holding the tampon in without being spastic. Just wondering if the cups would have the same effect or not. I understand that they expand into place?