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.
Secondly, I think there is a difference between "I'm not hungry" and "I don't want to eat because I'm afraid I'll get fat." The former denotes "anorexia (not having appetite)" and the latter denotes "eating disorder."
Because you had brain trauma, it could have triggered an eating disorder. My advice is to look into finding a therapist and dietitian in order to get your eating habits on track. From personal experience, it can and gladly will kill you.
When I was IP there was a young man who had brain surgery to help with his seizures. During that surgery they damaged a little part in his brain that caused him to be anorexic. You need to talk to a doctor and a therapist. Good luck