I got mine on the first try in three months. Amandalouise, I think, is correct. The more and better information you can give, the easier it will be. I even submitted pictures of the self harm that I had done to my face. Got the approval the next day. I think if you can really show how it affects you, and not just the Dx, that helps. Like Amanda said, releasing doctor's notes, etc. Having your doctors write good recommendations, etc. That all helps. It is case-by-case, but there are things you can do to help yourself.