My son has a lot of physical symptoms that no doctor can explain. Some have said it is nothing, others have said it is depression, some have said low thyroid but not low enough to treat, some have said chronic fatigue that can't be treated and so on. Meanwhile, my son barely touches his homework and only drags himself to class because we insist. He's 15 and should be enjoying high school. Instead he is miserable. He can't join the activities at all. We're at a loss. Do you have any suggestions?