Maybe it's worth talking about what you hope to gain by knowing the diagnosis. Do you think it would help you understand yourself better? Are you looking to feel understood by others? like part of a group? Would it make you feel like the problem was defined (and treatment defined, too)? What would the diagnosis do for you?

I always think of the time I went to a doctor for a rash. He looked at it and said, "Yep, you've got contact dermatitis."
"What's that?" I asked.
"Your skin is irritated."
"So... I've got a rash."
"Yep."
The moral of the story being: a diagnosis is just a word that describes what you're dealing with. It doesn't really cure anything by itself.