On my first visit to my pdoc, it was an hour-long appointment. He conducted a very thorough interview, taking notes during that time. He was very kind and the interview was conversational but comprehensive at the same time. I did not fill out any forms. He doesn't accept any insurance, so at the end of the session I wrote a check and he gave me a hand-written receipt.
Some pdocs provide therapy, mine doesn't. He is a psychopharmacologist, and meds are his specialty.
Don't worry about saying the "wrong" thing. There are no wrong answers! I can't imagine anyone saying you would need meds for the rest of your life based on a single interview.....
Good luck.