Adult ADHD

So my family doctor ordered some neuropsych testing for me because i had mentioned during a physical that I've been having a lot of trouble getting things done in life and school and in general things have been tough. He's having me tested for adhd and says it's a high possibly because my two sisters and my brother have it. I was never tested because I was moved to boarding school and my siblings were much older. The psych doctor is being very weird towards me and I get the feeling that she thinks I just want drugs because I'm a student (  I don't do drugs or get high ) . My grades are not bad, but keeping them there has been difficult. I dont know I guess I just feel weird doing this testing knowing the psych Doctor thinks I'm a just a student trying to get drugs.