I would avoid pharmaceutical drugs like antidepressants or antinausea pills because they don't help the brain heal. If you look at the most severe PCS cases, they usually have two things in common - multiple head hits and antidepressants.

I think Inflammation is the more likely culprit and treatment should focus on that. The brain's inflammatory system is on high alert after a concussion and a secondary impact, even a minor impact, can trigger an over-active inflammatory response and it's that inflammation that causes the symptoms.

A lot of the foods we eat, especially refined carbohydrates and processed vegetable oils, cause inflammation which will exacerbate your sensitivities. So you should adopt a low carb high fat / ketogenic / sugar free / wheat free / organic diet to help keep the inflammation down as part of your treatment.

• Stop eating sugar and refined carbohydrates (fructose, wheat, white flour) because they cause inflammation, lack nutrition, and are acidic.
• Replace wheat with whole grains such as Quinoa flour, Almond flour, or Chickpea flour.
• Avoid processed vegetable oils such as Canola oil as they can cause oxidation and inflammation which is destructive.
• Cook with healthy saturated fats such as Coconut oil, Olive oil, butter, or animal fats instead, and eat lots of it.
• Processed foods often contain the bad ingredients and added sugars so they should be avoided.

Anxiety is linked to brain inflammation, and so is PTSD. Diet can be and should be used as part of the treatment. The goal is to give the body optimal nutrition and optimal conditions so the brain can heal itself.

Then your brain needs to learn to stop over-reacting to the jolts. Try a Gradual Exposure strategy. Do just enough activity to cause mild discomfort but not so much to cause major symptoms. Rest and recover, then repeat.

When you do experience severe symptoms from minor bumps, take a double dose of Omega-3 DHA and Curcumin immediately after the incident. Both are anti-inflammatory and neuro-protective so they will protect your brain from possible injury.