Wow, that must have been terrifying! I'm so sorry that happened to you. I have to ask though, that this is the FIRST time you've gotten checked out by a doctor to ask about the pain in 20 years? Anyway, I was in a car accident about 30 years ago. So long. I was looking at my passenger when I heard the squealing of the tires and the hard hit came. My head went over sideways. So, one side of my neck had whiplash. To this day, when tired, stressed, or do much of any activity, that spot is aggravated. It hurts. I get headaches that radiate up. Can you get a referral to physical therapy? They are pretty well versed in a pain that they can't actually see why. And they will work on it. I found relief with the stretching, the therapy they gave me. I also began therapeutic massage which helped the most. I would still do it but can't afford it. I have a self massaging neck thing. Icy hot in cream form rubbed on the neck helps me too. Not sure where your pain is in your head. If you could use something like that. I have been to a chiropractor. Didn't love that but they did do some interesting things. I would not let them adjust my neck but they had an electrode machine and ice baths that helped. The PT also gave me a portable electrode machine for home. It causes little pulses and why it helps, I don't remember. But it does. A pinched nerve in your neck is painful. I've had that. There are places that release like right behind your ear, etc. but a PT or medical massage therapist would be really helpful.