I would like to know your opinion about my personal case.

On one side, I think that I’m not wrong when I need to know an accurate diagnosis. I have several reasons for it, that is; It’s inherent for me to help someone if I think I can do it. So, I’m very worried about the idea to say or give here a wrong advise if I don’t have the disorder. I’m very concerned about telling someone something out of the wrong starting point. If I say something that I see in a particular way and it’s very different from the way a person diagnosed with bpd, I would be misleading this person.
Another reason for wanting to know an accurate diagnosis is that if I have bpd as a core, any comorbid trait and illnesses are gonna depend on the core and I want to follow the right direction to progress.
Finally, I’m very obsessive and perfectionist and I see as it can be a great problem to know my real me. I see myself totally reflected in what is called, within other names, a quiet borderline but, I’m in such a way that I tend to make a mountain from a grain of sand. Example; If I liked let’s see, an expression said by another person, I copy it and use it in other contexts or with this same person. I spin around this behaviour and jump into conclusion that it’s the chameleon effect.
So, I have many doubts about it.
Self-destructive behaviour: I smoke and I sometimes drink wine or beer. So, I can interpret very rapidly that I display that trait.

Before, I wouldn’t give so many relevance to an accurate diagnosis. I thought...it doesn’t mind as long as I work on these traits, illnesses...but knowing myself a little more and noticing how much perfectionist I am and judgemental with myself, I’m in that moment that I need to know exactly what I have.

Last official diagnosis was personality cluster C. Apart from my social phobia and dysthymia.
It’s not the first time I’m diagnosed with cluster C. But, I learnt that quiet borderline are very frequent misdiagnosed.

What it stopping me from asking my psychiatrist an accurate diagnosis is that I don’t want him to think that I’m questioning his work.

I’m a bit lost. Do you also share my idea that it’s very important to know what your issues are or am I wrong and I could go on working on my traits?
When you were diagnosed, how was the process? Is there a scientific test along with the interviews? Why psychiatrists are so reluctant to give you a label?

Sorry for the long post.