When seeing a therapist, is it okay to present to her what disorders YOU think

Let's say some sad bloke decides to visit a therapist. He tells her what he thinks he's got. Is this acceptable? Is it going to mess with the therapist's official diagnosis of you? Is it worse or better than saying nothing at all, describing what symptoms you have, while subconsciously describing them in a way that would suggest that you have depression or the like? Is it acceptable, after she's given an assessment of your mental disorders or lack thereof, to act in ways that match her diagnosis of you? Otherwise, therapy's going to be made much harder, and her work much greater. And she's just going to start thinking that you've been making up all your symptoms, think you're a compulsive liar, continually ask about your siblings, pretend your siblings' problems are your own, give advice on those problems, and get frustrated when you don't take her advice. And then she's just going to give up trying in the hopes that you'll stop scheduling appointments with her. Anyway, is it acceptable to offer your thoughts about what you have and don't have?

I must have these answers.

...And I sort of mean it this time. <<';

dog the whole point of the therapist is to talk to them
just tell them how you feel