I think being very quick to diagnose a mental health issue (other than say acute psychosis or another emergency) is often the mark of a novice. It takes a lot more confidence to say "I don't know yet" or "let's figure it out together." Unless she has a lot of info about you from old charts or other sources, I don't see how she could possibly make a call like that in 2 sessions. Especially when you're also depressed.