I need to tell my dad about me looking at getting an autism diagnosis because I need to get a DSA evidence form filled out so I have the evidence because I don't ha e the diagnosis yet but I am on the waitlist. I have no idea how to tell him or how he will react because the last time I told him something like this (when I got a dislexia screening done at college) he basically told me that I couldn't have it and listed all the reasons why it was "impossible" (because he hasn't noticed a problem before, because it hasn't been picked up before by teachers at school). It really broke my trait with him and I find it really hard to talk to him about stuff like that, even when I know it will help and if I need to tell him. It makes me start to panic.
I know I need to tell him because I need him to take me tomorrow because he isn't at work. How should I go about doing this?