I had a lumbar puncture and 12 hours later 3 of my discs herniated. What did they do wrong?

Nothing. Are your sure it was a lumbar puncture? A lumbar puncture should not cause 3 herniated discs. How old are you? If you take 100 people off the street age 40 and over...Mri of the lumbar spine will show some bulging or small herniations in many statistic wise.