With any neck injury, I would think about buying a foam-style neck collar.
If you google racing (car, etc) protective gear, you will find these foam collars that are not too awful to wear. They are simple doughnut-style devices that should be easily explained away, if you feel the need to.
Think of it this way, if you (Lord forbid) should re- injure your neck, you will be done riding. With a good helmet, and the collar, your chances of injuring or re-injuring your cervical vertebrae should be greatly decreased.
Try this link to jegs.com to see what they look like Simpson Neck Supports - JEGS
-only my opinion ... Lw