Crazy PMS

I've never had PMS problems before outside of the occasional mild lower backache. I'm not on the pill because while my period is not on-the-dot regular, it does come every month for a fairly normal length of time and rate of flow. It has been easy to deal with. But for the past five or six months I've been getting Montezuma's Revenge bad at the onset of my period. What gives? [more inside]
posted by anonymous on Jun 15, 2005 - 17 answers