I've had 4 fusions resulting in levels l3-s1 total fusion and still having horrific pain. After harrasing my pain specialists he ordered more imaging and sent me back to surgeon. He found loose pedicle screw and misaligned pedicle screw. I have a real bad popping-grinding sound in lower back(Dr. said it is muscle) and cant get any further answers except that they want to install a spinal stimulator. Does anybody have ANY advice or info?