Has anorexia affected my immune system??

Anorexia causes your metabolism to slow way down. When your body is not eating it will try too hold onto every single piece of fat you have in your body. Your body will actually start eating your muscle when it realizes that you aren't giving it enough fat. Usually anorexics will gain a lot of when they first start eating again because your body wants to hold onto everything it eats because it was starved for so long. You just have to work on boosting your metabolism again. A lot of your problem might be psychological though. When you eat a lot it might cause you to feel fat even though you really aren't. And when you eat small and walk every where you feel healthy and skinny. Being 5 foot 2, 117 pounds is a beautiful weight. I am so proud of you for fighting your anorexia. It's a long struggle but you can do it. Never give up on yourself.