@novajeff Since you mention a spine injury, and not having had a full spine MRI, That would be my suggestion. Also, because it is when you lay down that you get major symptoms, so here is something to consider about spine injuries. You can have instability and movement of the vertebrae out of normal alignment, and that may be happening when you recline vs when you are standing. A lot of spine centers have standing full body X ray machines for this reason to compare if change of position causes a big shift physically in the spine between upright and laying down. There are also upright MRI machines vs normal ones where you recline. Instability can put pressure on the spinal cord if it is bad, and also on nerve roots. I am a Mayo spine surgery patient for a cervical spinal cord compression, and I had a slight amount of retrolisthesis which is a backward shift of one vertebrae over the one below it which was just 4 mm, but that was enough to cause a change in my symptoms, and when my physical therapist realigned my spine, it got better temporarily until the next muscle spasm caused a shift again and effectively narrowed the spinal canal.