Chiropractors and many other alternative practitioners are the people most likely to end up with patients with whom conventional medicine can find nothing "wrong", and many of them have done some searching or gathered some understanding that there is more going on than sometimes meets the eye.
Dr. Sarno was the conventional Dr. who dared to think outside of the box for his clients who had trouble healing from their "injuries" and discovered that many of his patients never had any "injury" or illness just chronic pain. He put science (which has since then evolved) and the machinations of the mind together and came up with what we now call TMS. So reading one of his books is essential for a good foundation of knowledge, plus he is very re-assuring. Claire Weekes is a great resource for the anxiety.
It's great you've recognized a life long relationship with anxiety. Anxiety is simply another distraction from what is really going on deep inside the subconscious mind, and is one of the traits many TMS folks deal with. Claire Weekes methods can help, but so can understanding a bit more of why we needed to rely on this distraction, and that's a large part of the work Sarno sets out for us to do. He asks us to look at our past, present and internal stressors and personality traits and see how these things have shaped our lives, and created an inner rage which, most TMS-ers find difficult to reconcile with. We're goodists, perfectionists, achievers, and can be very legalistic black and white thinkers. He asks us to begin to open our minds to the fact that the persona we have created is not truly in line with the people we are at our inner most core....and accept this as a matter of fact of being human. Rage is a normal natural human occurrence - our inner tantruming two year old that always wants it's way and is all about ME ME ME! While externally, our persona is often one of worring if we'll be liked, trying for some construct of being "perfect", not rocking the boat, working extremely hard, having to be the one to do everything, taking care of others before ourselves... in other words abandoning ourselves which creates incredible inner stress and rage which in turn puts the nervous system on high alert in fight/flight/freeze mode.
So after reading Sarno, (who is not a psychologist, so he doesn't go very deeply into a lot of this work and figures that we'll get to that point by beginning this inquiry into our past, present and personality). We often suggest people try the free Structured Educational Program which takes the basis of Sarno's work and gives us some great prompts to help with the internal exploration. You can find it at TMSwiki.org by scrolling down the page.
Another excellent tool is to use the ACE's test if you have not yet tried it. A simple set of questions that reach deeply. I suggest trying to do this as if you were a 6 year old being asked those very questions. It's eye opening.
https://americanspcc.org/take-the-aces-quiz/ (Take The ACES Quiz)
For example: One of the questions asks if you were ever pushed, grabbed slapped or was something thrown at you: My answer as an adult might be No - because I wasn't in what I now think of in a violent way. But I was slapped, hit and punished physically and verbally by a parent who was consumed with anxiety about how my behavior and actions reflect on them as a parent, and could be very volatile for minutes or seconds (before dissolving into a fit of crying, that was blamed on me being "naughty"). Some kids might be able to brush this off. I took this all to heart so therefore, as a 6 year old, both the physical and mental "abuse" was subtle but absolutely an Ace's score.
This is how I suggest you try doing the test.
You're doing good work, and are on your way to building a really firm foundation!