Should you ever tell your Psychiatrist what you THINK you have?

I think it depends on the psychiatrist, some don't like being told whilst others are open to the fact that you probably know yourself better than they do. I mentioned it to my psychiatrist but instead of telling him what i thought i had, i first asked him what he thought and then brought it up. He didn't rule it out and in his report he mentioned it as a possibility. However whatever your diagnosis it may change later on anyway, i've had several labels put on me but my current psychiatrist won't give me a diagnosis at all as she says 'given my age' and i'm 22. As long as your getting the appropriate treatment the diagnosis itself isn't all that important.