I have a son who will be 12 years old on April 4th and he has high functioning Autism (which he wasn't formally diagnosed until he was 9), he also has ADHD, ODD, and Anxiety. I am having a hard time with him when it comes to discipline. He is very hard to deal with when it comes to asking him to do something such as getting dressed, eating, or other daily necessities. I am so beyond frustrated and don't know what to do anymore. Any advice?