It certainly sounds, based on the list of behaviors you provided, that your son is a sensory seeker. Unfortunately, you can't make someone believe it if they've chosen to put blinders on. There are, however, many things you can do at home to address his seeking behavior and teach him to cope with it. I would recommend you read Sensational Kids and Growing An In-Sync Child if you can't see an OT for an evaluation and a sensory diet plan. At least you would have some options for addressing his seeking behavior and making it more manageable. The first thing I learned when my daughter was diagnosed as a sensory seeker was to give her lots of heavy lifting, pushing and pulling activities (move a stack of books from one place to another, fill a box full of toys and push it around the house, pull on resistance bands, make sure she gets a chance to run/play/swing/jump outside every day if it's at all possible.) You can also purchase chew sticks and the like on Amazon for very little money or let him chew gum--this dramatically decreases inappropriate things in the mouth. These are just a couple of things to get you started. The two books mentioned are full of great ideas. I'll be thinking of you. PM me if you have any specific questions. I'm happy to be a support for you.