How can I find a reliable chiropractor?

I'm having some chest and neck pain and just got checked out by my doc who found no cardiac or respiratory problems and ruled out stress/anxiety so he strongly feels it's muscular/skeletal. I'm also having headaches that start in my neck. He recommended seeing a chiropractor but I have no idea how to start looking. What criteria do I use in choosing one? What are good questions to ask? Thanks!!