I would tell your therapist so you can get the help you want. I think it will mostly be "support" so you aren't so stressed! Your therapist and suggest who else you can talk to or talk to them for you perhaps.
Good link with info from Duke University:
http://health.usnews.com/usnews/heal...bout.ednos.htm
Duke's Eating Disorder Center link:
http://eatingdisorders.mc.duke.edu/