Eating Disorders Support Group
Eating disorders are marked by an obsessive need to control the intake and/or purging of food. This community is dedicated to those struggling on the road to recovery. Join to discuss your experience with others and find support. Get advice, ask questions, and meet others who are going through similar struggles.
Also, they were talking about changing the weight loss criteria from 85% of body weight to, "Restriction of energy intake relative to requirements leading to a significantly low body weight in the context of age, sex, developmental trajectory, and physical health.
Significantly low weight is defined as a weight that is less than minimally normal, or, for children and adolescents, less than that minimally expected."
So, yes it certainly sounds like you have anorexia, though there are other criteria as well. And, regardless of the DX, eating about 400 calories a day is a problem. That is not enough food to sustain a healthy body. Please get help if you aren't already.