I'm the mom of an almost 8 year old son with an unsure diagnosis of Autism spectrum disorders, Pervasive Developmental Disorder (PDD)-not otherwise specified, and ADHD. He rarely uses the bathroom at school and as soon as he gets in the car he is wiggling because he needs to go. He will not have a bowel movement anywhere but at home and he refuses to wipe himself. Even going to pee in a public bathroom is a huge task. At home he will not go to the bathroom unless someone goes with him. He is almost 8 and this has got to stop. Does anyone have any advice?