My stomach & bowels are horrible areound my period- I just got my period this past Sunday, & all wknd I was basically on the couch between bathroom trips. The cramping from the period intensifies any bowel cramping, it's just awful. My UC usually acts up the 3-4 days before I get my period, then opnce I get it things settle down. I believe it's the hormonal imbalance, something along those lines. I'm not on the pill. I do take Tylenol if it's very painful, but I find I don't need it too often.