Go to a nutritionist to see if you have any food allergies. My wife had quite a few symptoms, including depression, among others, and it turned out she has "gluten intolerance". Since she isn't allergic to gluten, the cause-effect relationship was not obvious. After cutting out gluten, and several other foods, she was completely freed from the symptoms she had experienced for years and years! The issue was that gluten was preventing her from properly digesting foods, and nutrient absorption.