I feel your pain (literally!). (For several days a month I swear my belly got so big I looked pregnant). I talked to my gyno at my annual visit in November. He took some blood and checked me out, but everything seemed to be fine. However, I started eating more fiber the last couple of months in an attempt to lose weight and that seems to have had a huge impact on the problem. Even though it was mostly around my periods, I guess maybe the normal water retention was making the rest worse? I've just been eating those fiber bars as snacks (and they are pretty good) and Fibre One Cereal occassionally as well (also tastes way better than I expected it to). I keep thinking I'll take fiber tablets, but I haven't gotten that far yet. Good luck!