matt,

As rmschaver has said above, please do promptly see your physician.
You must stress when making the appointment, that you are experiencing "problems with concussion".
I don't know where you are located in France, however the dr's office might even refer you immediately then (on the phone) to a specialist.

Keep us posted, Matt.
We do know how horrible this all can be, to not feel like ourselves. You're still there, I assure you.
You just need some direct care of physician, and to follow the protocols.
And, keep us posted.

Sincerely,
Theta Z.