What is wrong with me? I have loose stools nearly every day.

Daily loose stools. Causes of daily loose stools include irritable bowel syndrome (usually associated with stress), lactose intolerance, or severe constipation (in which new food from the stomach comes to your colon as a liquid, has no place to go, and so leaks around the huge mass of constipated stool. This is surprisingly common and is sugggested if you have any past history of constipation.