Dogmama - IBS-C - is that what they're calling it? Hmmm. About 2 years ago I had a colonoscopy just to make sure that there was nothing else - and the doc said he could see the signs of IBS. Not sure how, but....
Thankfully I am not a big fan of carbonated soft drinks, though every once in a while (1 in 2-3 months) I crave a diet coke from the fountain (never bottle or can). I do have an ice coffee in the morning - but it's pretty watered down. Other than that, I have tried acidophillus (sp) and every brand of anti-bloating/gas remedy available OTC - nothing seems to work.
Anything made with white flours will hurt me for 2-3 days. Can't eat beans (except green ones). Can't eat pasta or rice. I can eat some whole grain stuff though, so I don't think I have a wheat allergy. Corn about kills me. Popped -kernel - or cob - doesn't matter. Can't eat potatoes - but I can eat french fries for some reason. I think it's the grease - helps it move along
Sorry - rambling now.

But I should mention - I eat lots of greens...I love veggies. Most don't bother me at all. I eat PLENTY of fiber. Lots of nuts.