Great advice Kazoo, back surgery is serious stuff.
Some 20 years ago, I was having major back spasms (like 2 weeks off work every time it happened ) and found out thru MRI's, and a pleasant spinal tap, that I had a blister on my spinal cord about the size of a plump lima bean. I had an exceptional surgeon and a PT team that I swear was staffed by ex Catholic Nuns! I count my blessings every day that everything worked out.

Its nothing like putting a new transmission in the truck. It can be life changing.