My husband woke up this morning with a pain in his lower left abdomen. Mon, Tues, Wed of this week we both started a fiber supplement (Equate brand) in the morning. He experienced bowel movement normally until Thursday morning when he had none. He has no fever, but he has vomited liquid. He ate vegetable soup at lunch and although nauseous after, he did not vomit. He took a 2 hour nap and felt better when he woke, but when he sat up and drank some ginger ale, the pain began again and he vomited the ginger ale.