Whats the aftermath of a serious concussion i've been having problems with feeling nauseated every time i tilt my head for about a year now?

May be unrelated: to concussion. There are many possible reasons for your symptom ranging from otoliths in the inner ear to nerve damage to structural abnormalities leading to vascular compression of arteries entering the brain. The answer will require a good history and physical exam with imaging determined by the findings of the h and p. Schedule an appointment with your primary care physician.