If it's not good, it could be costing you your health. Worrying and anxiety causes low-level stress in the body, resulting in bone density loss! Your bones will actually be depleted of minerals that are excreted through your urine! So drink all milk you want, but if you are constantly berating yourself or you're stressed, you could still get osteoporosis!
When negative thoughts arise, especially those about your body, ask yourself if that is something you would say to a loved one. If you know about the Law of Attraction, what you put out you get back, so if you're worried about becoming or being fat, you're just bringing on more fat! So cherishing yourself with love will heal and nourish your body more than any exercise or healthy food can.
Relax with friends, take a bubble bath, get plenty of fresh outdoor air to oxygenate your body as much as possible, take a yoga class, and if you're gonna eat it, love what you eat! It's that simple!