If the chiros did the 'twist the head and pop the neck' adjustment, that is often too aggressive. A gentle traction and mobilization or gentle upper cervical technique may be helpful. But, no neck therapy will help if you do not get inflammation under control with ice and maintain good head and neck posture, especially when sleeping or resting. The dental chair can be problematic by how it holds your head and neck or by all of the stressful sounds. It takes months for a whiplashed neck and concussed head combination to settle down inflammation wise.