I tried mindfulness for back pain and it worked, for a short while, while I kept on meditating daily. But it was a struggle. In the meantime I discovered that taking Ca + Mg supplement does away with my pains. No doctor was able to give me this hint, I discovered it by mistake when I took an effervescent pill.
Calcium worked for you? It's not been my experience nor some others. I've heard it explained that since calcium is needed for nerve transmissions, pain can be worse if you take excess Ca. It's all anecdotal but I feel like my back pain is worse when taking Ca supplements.