I have deteration of l4 & l5 disc and in a lot of pain. i'm waiting to go to pain clinic. i have had one lot of injection in my back but nothing since?

Disc pain varies: Sounds like you had epidural injection for pain relief of disc degeneration or protrusion. These are usually done in sets of three to see if get relief. Sometimes these disc problems burn out with time. If relief can be obtained with conservative measures rather than surgery, that's the best alternative. Surgery can have its own complications. Physical therapy for disc problems may be helpful.