Diagnosed with ADHD but feel like I have high-functioning autism

Before you talk to your therapist, you should do more research to be sure. And make sure you're updated on terms so you don't use the wrong ones ^^

your therapist is there to help you, and you should be able to talk about your thoughts and actions freely with your therapist without having to worry about backlash. if there’s a question relating with your recently diagnosed ADHD, instead of answering the question, tell them you think you connect more with high functioning autism, and ask if they could look into it for you.