Sarah,
Your story and history regarding your cervical spine injury and surgery is very much like mine.
I found a soft cervical collar just by the act of immobilising and supporting my neck would help.
Maybe quit driving for a while too? At least until you get the pain under control.
Also I found Gabapentin to be a great drug with little if any side effects (for me anyway!) and wish I'd been prescribed it sooner than it was.
It helped me sleep and cope with the pain which thankfully went after a few months and now I no longer take Gabapentin or wear a collar .