The problem is being scared of
vomiting or eating. That is just a phobia
and there are hundreds of phobias
and lots of people have them. So the important thing is to just focus on getting that fixed. The chances are, once that is fixed, you won't have any more problems. I think if your doctor thought you had an imbalance of something, they would just give you some medicine. But they might think they can fix you with just therapy.