Something I've learned on PC is that it doesn't really matter if you don't identify with the forum title, as long as you find help within the forum. For example, I started posting in the "Survivors of Abuse" forum about issues from having been tortured because people in PTSD didn't seem to "get it". And I post in Bipolar in the "Why don't we want to shower" thread. I don't have Bipolar, but showering gives me major problems.

I think you might find some peers either within the Anxiety, Panic, Phobias forum, the Eating Disorder forum, or the Depression forum. Or you can try the Search Engine and see where other people with BDD post.