There are two injuries that occur during a concussion. First there is the impact force that can do damage, and the second injury is the inflammation that the brain produces in response to the impact and it's that inflammation that causes the symptoms. Inflammation has a beneficial role in the beginning, but prolonged inflammation is bad.

Whether there was enough impact force to cause injury is questionable, but the secondary inflammatory response can occur with or without a forceful impact so that may be causing your symptoms.

So take Curcumin and Fish Oil, both of which are anti-inflammatory and neuroprotective. Then rest and relax for a couple days to allow the inflammation to subside, then gradually resume your previous activity level.