My Symptoms, just before, during, and after a bowel movement abdominal pain puts me on my knees, sever nausea to the point I do vomit, not all the time but the nausea feeling is so sever I start to produce a lot of saliva (water) in my mouth. What’s causing this? I had a colonoscopy revealed 6 polyps not cancerous nothing else found. Had a biopsy of my stomach nothing found no cancer or ulcers. Gallbladder squeeze was a 59% no gallstones. Was told my intestines show nothing wrong. All other organs are fine a ultrasound revealed. Could this be in fact IBS. If not what can it be?