I Had A Concussion 8 Years Ago. The Only Challenge

I had a concussion 8 years ago. The only challenge these days is that I can't handle loud noise. I worked at a church camp in June where the noise was excessive. Ever since I have had a tightening around my head - feels like pressure, dizziness, difficulty focusing and driving. I've had a CT scan, seen a general practitioner, and ENT specialist and no one knows what to do. The only relief I get is from taking 800 mg of Ibuprofen which I know is not good for me. Help, please!!