PD, there isn't an easy answer to your questions. I was in and out of my dentists office for years and when I finally had my last root canal and I still was having pain triggered when that tooth was touched, it was apparent that the tooth was dead(no feeling) and the cause was TN. My DH woke up to my bouts of this horrible pain during the last root canal episode as just drinking something set off the pain. I was eventually sent to a neurologist who diagnosed me. Sadly it took years for the docs to get it right. I think you need to start with your GP or PCP. Let them try to help guide you as to whom to see next. One thing I did pick up is you mentioned that when you massage between your ear and jaw that the pain feels better. Is there a dentist who specializes in TMJ in your area? If so, you may want to consider getting an appointment with one to rule that out as a cause of your pain. I'm not a doctor and that is really who should advise you about where to go next. Good luck and let us know how things are going.