I'm anorexic and bulimic. when am i going to die?

I'm ve been anorexic for 4 years, and just started to be bulimic a year ago. Nobody could help me to get through this. I went to the doctor, i talked to my mom and even went to rehab. I don't remember the last time i had a day with breakfast, lunch and dinner. when i'm forced to eat, well i do eat but then i throw everything up. I know they're killing me but i can't stop. So don't tell me to eat or anything like you should go to the doctor. I would tell you that i did and they couldnt help me out. All i want to know is when i'm going to die? Will i die about 4 years to come?