Reksy, that's really weird. When I was on regular vicodin meds post-op, I developed a horrible pain on my left side from my neck to my pinky. I was convinced that they had done something to a nerve in surgery (they did manage to paralyze part of my diaphragm, but that's another story). Nothing showed up on any tests with the shoulder, neck, arm, etc. And I was seriously convinced it was at least a pinched nerve. I was writhing in pain. Oddly, it improved as I weaned off the meds. I attributed that to coincidence at the time, but I have taken Rx pain meds a few times since and have noticed a similar pain, though not as intense. Maybe one of our docs can ring in here if this is some sort of known side effect. Hope it is easily rectified, regardless, you've been through enough.