partial empty sella and smaller than normal pititary gland

I was in a car accident a year and a half ago. The air bag and seatbelt i guess you say whipped my head and neck. My nose was injured. I had a concussion and two blown discs in my neck. I have had severe headaches since the accident. I was diagnosed with central spinal cord syndrome. My neck had medal plates put in. It is a year post op. I have suffered with headaches, severe depression, nerve problems in both arms and hands, pain in neck. My family noticed loss of focus and memory problems aftrr the accident. Now that i am trying find some type of normal in my life and trying to do more. I notice problems focusing, comprehending things and giving odd responses. My memory is terrible and was fine before. To complicate things I have vonwillebrandts disease. My left eye prescription changed 2 levels since accident. Most of head pain is on left side. I had an mri with contrast that showed partial empty sella and a smaller ghan normal putuitary gland. Waiting to see neurologist. What is wrong with me and how can it be fixed?