Hi I need some help coming up with a proper Diagnosis for these symptoms. 19 year old single african american male 8 year history of emotional and behavioral problems. For the past two years he has begun isolating himself, refusing meals, neglecting his personal appearance, when he walks he shuffled and took small steps on his toes while constantly looking back, checking and rechecking, he would run in place, removed his left arm from his sleeve as if he was injured and his shirt was a sling, refused to engage in personal hygiene, he left his bedroom infrequently defecating on paper towels and urinating in paper cups, he lost 20 lbs and would eat only at night when everyone was sleeping, he has eating rituals of coughing hissing and hacks with severe head tossing, he narrowed his food intake because he thought certain things had diseases that were poisonous, he spent large amounts of time making sure waste basket and curtains were in the right places, he said his rituals were to protect him and his family from future catastrophe. Please Help!