The CT Scan shows you do not have any brain bleeds or contusions (bruises). This does not mean you do not have a subtle neck injury. If you can find a chiro who uses gentle techniques, it may be helpful. Upper cervical chiros or physical therapists who understand upper cervical issues can help.
Check Jo*mar's link or
FAQs | National Upper Cervical Chiropractic Association
Your neck may improve by just improving your sleep posture.