I've got some of the same conditions as you with others thrown in. I was diagnosed with arthritis at 12, since then the shopping list of medical conditions has just increased - including degenerative discs in the top and base of my spine, CFS, Fibro and lots of others lol.
Have you ever tried a tens machine on your back? I love mine.
Can I ask why you are only taking lansoprazole when you need it? I was told to take it every day due to the cocktail of meds I take? I would have thought with your hernia issues you'd have been told the same...
What about mindfulness for pain?