Thank you all for your responses!

The biggest hurdle and issue is that because most of his anxiety is towards his health and anything that might alter it he is terrified of medicine. He has a severe tooth infection and needs to get 3 of his teeth pulled and he was prescribed antibiotics over 2 months ago. He finally took them for me and my son (because honestly I was losing my mind) a week ago and has been panicking ever since and is about to get his teeth pulled tomorrow. Which we don't know if he is able to do. Anyways taking medicine, ever for anxiety is a huge issue for him. He literally can't bring himself to do, whenever its something new that he is not sure how he is going to react to. Essentially he just needs to get out of the house and start taking baby steps to do things that are uncomfortable and not reinforce his fears by avoidance behavior which is what he does all the time.