Physical therapy, if it is gentle and just works on light traction and mobilization without any range of motion may help you to reduce inflammation. You will need to be very disciplined to sleep with good head and neck posture of many months. Some simple neck strengthening exercises against your head weight can slowly increase your neck stability. Laying down on the floor on your back and belly while holding your head just off the floor then on your side holding your head straight. Ice your upper neck when you have a headache.