Asia
Fantastic result regarding your spine and posture. Just the other day we saw an elederly lady who we have noticed walking with a posture problem for some time.
She is now bent at a right angle and is unable to straighten up. My wife asked what causes that. I replied she probably woke up one morning after laying horizontal curled up and could not straighten.
Inclined therapy can put an end to many of these problems in the elderly! I have argued this from the beginning.
Your neck problem could require some gentle therapy to free it up, but will probably resolve itself on increasing the height of your bed.
If you change your sleeping postion it might help to sort this out. Thinking is,
For half hour or less only to begin with: If you lay on your left side (inclined) with no pillow or at least a much softer pillow, it may help to gently stretch the tendons in your neck. I suspect the tendons have become shortened.
In dogs, there is a condition called luxating patella (floating knee cap) on the hind legs. This is caused often by excessive exercise or sometimes injury. This results in the opposite affect on the tendons, which become stretched and do not return back to normal tension due to continued exercise.
If we force the dog to rest up for several weeks and only exercise the dog on a lead, these tendons shrink back and pull the kneecap back into the groove that normally locates the patella.
The point in mentioning this is that rest can tighten tendons, so logically stretching those tendons should free up your neck.
It might also be worth checking to see if you have developed bone spurs on the joints, though this is rare, it can also prevent full movement in the neck and spine.
http://www.mayoclinic.com/health/bone-s ... ion=causes
And sorry if not... 
