I was recently diagnosed with IBS with constipation. I have the basic symptoms of constipation, gas/flatulence, and very bad anxiety. I've recently figured out I have another "symptom." For whatever reason, I hear loud rumbling noises in my stomach. They're usually in the area of the descending and sigmoid colons. The rumbling usually goes on for about five days straight, but then will all of a sudden stop the next day. I have a feeling it's built up gas (pressure) in that area that is relieving the "tension" in my stomach, I guess you could say. Has anyone ever experienced this and how long does it usually last for you?