Scared to die from anorexia?

I'm 16, 88 pounds, 5'0 and declared anorexic and was also diagnosed with an eating disorder. I try to eat without counting calories but every time I do I freak out about weight gain. I eat over 1400 calories a day and exercise every day for an hour. I do interval training. I run at 20 minutes at 6.0 mph. Then walk at 4.0 on an incline of 7. Then run for 10 minutes at 6.0 mph. Then walk for 5 minutes at 4.0 on an incline of 7. Then walk at 5 minutes at an incline of 10. Everyone tells me to just eat but there is more psychological problems. I connect beauty with thin. To me, if I'm not thin, i'm fat and imperfect. I do have a therapist and a nutritionist but haven't been listening to my eating plan that she gave me in the fear of gaining weight. She said I have to gain some weight. However, i'm scared to death. I don't know what to do. I haven't been eating right. I eat 1400 calories of sweets and junk every day. That's it. I don't wanna die but I also don't wanna get fat. HELP? :(