If you are willing to do the work to take yourself out of back pain, go to the website backpainoconnor.com and start reading.  It will explain the biomechanics of the disc unit by reading the free information and the introductory video.  Start by watching the testimonials.  If you look up the author, I practice in Northern California. I am an M.D. adjunct professor at Touro University College of Medicine and previously an associate clinical professor a UCDavis college of medicine for 10 years.    I have taken numerous disc herniations out of pain non surgically.  From my limited perspective, you describe a disc problem in which a piece of the central disc material has been dislocated and the stretching of the intervertebral ligaments is causing a reflex muscle spasm..  The website shows you how to self diagnose this condition for free.  If you have a displacing disc, you can actually get out of that pain by self-directed physical therapy.