I too had recently injured my neck lifting lumber. It would pop out and I would have to push in back into place by pushing my jaw in. It was painful! It also felt like the back of my skull was hooking onto my neck bones. Strange feeling.
I ended up going to a Cranial Sacral therapist. She worked on me for over 2 hours. The following day, my neck stayed in place and 1 week later, I was lifting lumber again. It was incredible! I asked her if I needed to return and she said that the 1 treatment should do it. I was surprised! It's been over a month now and I still have not had any problems. That was my first experience with a Cranial Sacral Therapist. I have always used Acupuncturists.