Changes in bowel movements, narrow stools, terrible belching, constipation, diarrhea, lower abdominal pressure/discomfort, collapsed stools, gas, extreme fatigue, nausea, burning in abdomen and intestines, shortness of breath, dizziness?

Exam needed: Many of your varied symptoms could be caused by irritable bowel syndrome, lactose or gluten intolerance, spastic colitis, diverticulitis or inflammatory bowel disease. Shortness of breath and extreme fatigue would require a general investigation while the gastrointestinal symptoms are best evaluated by a gastroenterologist. See your primary care physician for starters.

Change in stool: Could be H pylori infection of stomach , food intolerances like lactose, gluten sensitivity, soy , early inflammatory bowel -Crohns / ulcerative colitis ( usually associated with blood) or irritable bowel or infection like camphylobacter. F/u/ w/ doc need stool analysis, H pylori testing, check B12 ( usually low in malabsorption) and possible imaging , scoping., elimination diets