SOS! - MRI, CT & Xray spinal results always Unremarkable. Why??

I almost snapped my spine in half in a freakish fall onto my head when I was 16. I'm 42 now and my sensitive, easily triggered spine is still the bane of my life. MRIs, CTs and X-rays never show the debilitating torture of my spine for all these decades.

*Why is this and is there another more sensitive or sophisticated scan or machine I can utilize? Please help, I need to go back to work. Thanks.