So far he has only the additional anxiety over the fire drills. I have made an appointment for him to go back to therapist for a booster session or two. Also, he is being evaluated for some possible sensory integration issues. We are just looking for some answers to this puzzle. This disorder just creeps up on you and you never see it coming. I hope you are also able to get some answers for your son. Like you said, the worst part is watching them suffer and not being able to help.