Depression

I am hating myself right now, to the point of wanting to cry. I look in the mirror and am disgusted by how thin I am, I know it's not healthy. No matter what I do I can't gain any weight though. I'm literally afraid to eat healthy food because I feel like I need all the fat and carbs to keep from losing even more weight. The thought of becoming so thin I get sick keeps me awake at night because if I get sick, I can't take care of my son, and if I can't take care of my son I will have nothing. Then I get stressed, and I can't eat when I'm stressed or I puke...uggh