My son is severly autistic, non-verbal, age 19, and has had seizures since age 10. Meds have not helped much. Two months ago he had the vns surgery and seemed fine until 2 weeks ago. Could the device be over stimulating?? him and causing him to not sleep well, be almost manic and out of control at times. The strangest is that he is now refusing to leave the house and go for walks, get in any vehicle and go anywhere. He wont go to school, doctor appointments or even mcdonalds (his favorite).