My 15 year old son has been having problems with headaches, dizziness, blurry vision for the past 3 months. He was an honor student and suddenly in October this all started and his grades began to plummet! He was recently diagnosed with Post Concussive Syndrome. He played football, but had no significant head injury----apparently, it came happen with a series of minor licks to the head also. He is still having problems comprehending and focusing in class. Any suggestions on things I might can do to help him?