this is Dr. David
xrays are not good enough to look at your disks and spine and nerves
you need a total spine MRI scan with contrast to look at areas of slipped disk and pinched nerves in your pack
all of your nerves in your spinal cord run through your spinal canal
a slipped disk or spinal stenosis can put severe pressure on your nerves and could be causing your lower back pain and ED and shooting pains into your legs and hands.
you need an MRI scan
let me know if you have questions.