If you're feeling worse now that ever, and you've been yo-yo dieting the majority of your life, you might be looking at hormonal imbalances in glucose, insulin, serotonin, thyroid, or any host of other medical conditions. The place to start is not with your therapist, but with a gynecologist or a primary doctor. Do it very soon if you haven't already. Your life may depend on it. You might think that you're too young to develop a chronic illness, but even young people suffer irreversible disease.