I recommend studying the short book "Treat Your Own Back" by Robin McKenzie and also finding a physical therapist familiar with his techniques. I was in similar distress and it was fairly quickly resolved by these techniques and I have also observed these techniques being effective for several other people. Physicians in the US are not trained in physical therapy yet physical therapists in the US are only allowed to apply physician-prescribed treatments! This can lead to some bizarre Catch-22 situations until you find a highly experienced physical therapist who can work with you. Checking if they use the "McKenzie methods" is a touchstone.