You need to protect your head. The minor head bumps cause inflammation and the inflammation is what causes your symptoms, so it's important to protect the head while your brain recovers and heals.

Wear a padded hat like the Ribcap or the Unequal Dome 3.
Protective Dome Baseball Hat Inserts & Liners
The Unequal Dome 3 needs a larger hat to go into so get the XXL size like this Under Armour