You may be experiencing a transition from the acute injury to a more chronic whiplash syndrome. Patients with ongoing symptoms from a whiplash injury are said to have a whiplash associated disorder (WAD).
Symptoms linked with WAD can include headaches, neck pain, changes in vision, and dizziness. Muscle weakness and numbness or tingling are also possible. Difficulties with memory and concentration have been reported along with negative mood or mood swings.
The force of the injury isn't always consistent with the symptoms experienced. And the degree of injury doesn't always predict who will or won't develop WAD.
At best, studies show that patients with the highest level of symptoms early after an accident have the worse outcomes and prognosis.