I have some chronic pain issues as well, some of which were solved and some are managed. I'm sorry you're going through this. Have you tried getting a second opinion or maybe a different type of medical provider? I had headaches as well that turned out to be largely brought on by stress and also some bad posture. I did get an MRI+MRA just to be sure nothing was actually wrong in the brain itself, but techniques to reduce the causes were helpful to me. Good luck!