I am having problems with my abdomen. I am always constipated, however about nine weeks ago things changed. It started with loose stools and swelling in one spot on my left abdomen. I went to the dr and he gave me antibiotics for diverticulosis. I changed my eating habits and things got a little better. A few weeks later I had a salad for supper and the next day I was in the bathroom all day!! I also had severe abdominal cramps. Since that happened the swelling on my side is a lot more pronounced and I have pencil thin stools. I also cannot have a bowel movement but every two or three days. I usually go daily. I have suffered constipation in the past due to hypothyroidism. My stools have also changed in color to a very light tan and at times white. I have terrible belching and stomach cramps. I am thinking that I could have a blockage such as a polyp or stenosis of the colon.