Dear Pamper,
I'm not a doctor but my wife has the same problem you are talking about. She was in an accident with her sister about eight years ago. They were rearended by a flatbed truck and got whip lashed. He physician told her she had arthritis which was due most likely to the injury. Have you had any trama to that part of your spine? Besides that, it could be from your genes. You know, aunt sara or grandma sue. I hope you find the answers you are looking for. That's why we are all here, looking for help and perhaps a bit of moral support.
bye