I have a son that is turning 12 years old. He has a white blanket that he rubs and smells every night while sucking his thumb. His breath smells bad because of his thumb sucking. His blanket smells like saliva. He has Anxiety and ADHD which he struggles to cope with. He always carries his blanket around and sucks his thumb every minute he gets. He cannot fall asleep without sniffing his blanket. He says he does not do it in school but when I was walking in I saw him doing it in front of the class while watching a film. I make sure he does not bring his blanket, which he is okay with. He seems to be really stressed because of school. He feels safe with his blanket over his nose and sniffing it while sucking his thumb. He drags his blanket all over the house, but he is not allowed to bring it out of the house. The blanket is surprisingly not that beat up besides some rips. He calls it “blankey”. What should I do t9 help him stop?