My boy is 6 years old. A week ago he started having non-rational calamity thoughts. For example, he saw a kid wearing a Messi jersey in a cafeteria and thought that because of this he would be dead by the next morning. He thought that if his father entered the room and he was not seated, he would die, etc. And he has what looks like little rituals, repetitive acts that he has to perform, like touching you with the elbow, standing over one leg, etc. This makes him sad. What can we do?