Sounding younger than I am

Hi everyone

I have had a difficult day and in an effort to talk it through with someone I called the Samaritans.

One of the first things she said was "you sound very young, how old are you?" I told her my age (nearly 30) and she spent most of the call telling me that I sound very young and then repeating my age. It frustrated me because it was hard work to find the courage to call them but it felt like she was not listening to me, just worried that I had lied about my age to her, even though i hadn't. 

This is also something that is written in my autism report so I always assumed it was autism-related but I told her I had autism and it didn't stop her questioning. 

Sorry, this isn't important, it just annoyed me. I can't help how my voice sounds.