Hello. I'm not really sure how to phrase this properly so this might just turn into a word dump. 
After a lot of soul searching and discussion with my siblings I think I should get a professional diagnosis if I am borderline or not. My mother was diagnosed with it many years ago and after some particularly hard times and as we all age into adulthood my siblings and I are very worried that one of us will have it. We all show some signs but since we are young we worry it will only get worse.
Questions are: 
How would I begin this process?
Is there a genetic test or would it have to be a psychiatric evaluation?
Is there a way for this to stay anonymous ?( I am an adult but I am on my mother's insurance) 
Thank you for any support you can offer (ps sorry, I'm on mobile)