My 40 yr.old son his first and only a grand mal seizure a few days ago (tonic, clonic) that lasted a full 5 mins with 2 mins pulseless (to his and our knowledge he has not had a seizure of any kind in the past). ALL tests normal (chemistries, CBC, CT, MRI, EMG, EKG). In the past two years he has had a variety of symptoms that sound like they should be connected (leg [including hip and knee] pain, weakness and tingling; neck pain; increasingly severe headaches, difficulty concentrating or staying focused, ringing in the ears, intermittent fever of unknown origin). What should we do?