Poor girl! It can be rough when you start dieting. I agree with the other girls, that you need to really look at what you are eating. You need protein, fat and carbs, just try to eat the right ones. If you get off balanced, you really can feel sad and depressed. Goodness knows we've all experienced it when we went on crash diets. Henceforth the name crash! So don't be too discouraged, but do go and get your blood tested. Give yourself a little time and a little attention and I'm sure you will feel better soon.