After years of wondering, going back and forth, and putting it off, I've finally got an appointment set up to get evaluated. I set the appointment about two weeks ago and it's tomorrow, I even did all the paperwork already! Is there anything I should know, or consider going in?

Update: Well I got a diagnosis. I have ADHD, and he's sending his recommendation med to my PCP. It's weird that it has to go through them, right? I figured a therapist could prescribe meds. Also he added that I have "highly impulsive" ADHD. Is it normal to add the qualifier? I mean, he's not wrong, but are there categories?