My deceased wife had chronic bladder pain which urologists from UCSD to UCLA could not find any organic cause. Even bladder Botox didn't work. Was was hitting the upper level of opioids so her pain management doc recommended a pain pump. He was an excellent doc who managed the monthly refills. The pain pump delivers a micro dose of the opioid directly to the spinal cord. So there is less detrimental effects on the overall body. After about a year of getting the dose right, it helped. I'm so sorry you have chronic pain. It's a terrible burden to bear. The Buddhist were right when they say life is:birth, suffering,pain and death. Good luck.