I Just Got Back From A Treatment Faculty For My

I just got back from a treatment faculty for my Eating disorder 2 months ago, but since a month ago Iv been relapsing and now it's to the point where I haven't eating in days and exercise a lot. I literally want to die because I can't handle the stress from it. I'm not sure what to do about all of this? I have a diagnosis currently of EDNOS but I'm close to being underweight now.