How long it lasts usually depends on what you are doing to help with healing. Are you icing your neck ? Are you avoiding bad foods ? Are you avoiding triggers ?

Most of the fixes are patient directed. You need to become a full time participant in your recovery.

When you ride/drive in the car, try to sit with your back off the back of the seat with your shoulders forward. This allows your spine to absorb the shock and vibrations from the road.

I have to do this. I also need to not look side to side quickly or repeatedly. When I am riding, I need to not focus or look at things that are close that go by. It is better to focus on distant objects.