Just to add my thoracic back pain experience, I herniated the T6-7 disc and it was found through discogram that I had tears in T5-T8 with the T5-6 generating pain and T6-7 also. I had 3 ESI up to that point targeting the T6-7 disc herniation to no avail, but I had one more after learning of tear and the doc put it as close to the tear as he could and within two weeks the stabbing pain that was the absolute worse was gone and I can say two years later never came back an I rarely have issues in T spine anymore. I was same as the original poster of this topic, I had absolute pain releif while lying flat and while in inversion. In my humble opinion the tear caused the stabbing pain vs the herniaton, but it took 6 years to find. Good luck