What do you advise if i was diagnosed with anorexia nervosa, but i doubt this is correct?

+ Signs below + AN: Restriction of energy intake relative to need, leads to low body weight in context of age,sex, development and physical health. Low weight means weight less than minimal normal or less than minimally expected. Intense fear of gaining weight or becoming fat. Experiences ones body weight or shape on self evaluation failing to recognize the seriousness of the current low body weight.