Thanks for your question on Healthcare Magic.
I can understand your concern.
By your history and description, possibility of injury today
cervical spine is more.
You have done sudden movement of head followed by cracking sound. This is characteristic of cervical
spine injury.
So your headache on movement and
neck pain are due to this only.
So better to consult orthopedic doctor and get done clinical examination and
MRI of cervical spine.
This will tell you about severity of the injury.
You will mostly improve with all these.
1. Avoid sudden jerky movements of head and neck.
2. Avoid bad postures in sleep.
3. Sit with proper neck support.
4. Avoid heavyweight lifting and strenuous exercise.
5. Apply warm water pad on affected areas.
6. Wear collar belt to neck for immobilization.
7. Take painkiller and
muscle relaxant drug.
Don't worry, you will be alright with all these.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.