For years I have had back pain, 4 years ago I had a lamenectomy on my L5-s1, and a discectomy on the disk below, aside from still always being in pain, and pain constantly shooting into my legs and toes, when I need to make a bowel movement the pain in my lower back on the right side increases almost to the point where I m in tears, and stays elevated pain until after the bowel movement. What could be causing this extra pain? Is it a sign another vertabrae has gone bad or pinching more nerves?
This does not look like the vertebra has gone bad, but yes, the sciatic nerve may be getting pinched, and it occur at several places. Going by the history, it looks as if you are suffering from performs syn Chat Doctor.  Stop putting wallet in your back pocket, foment the area with hot water, ask your doctor to prescribe a muscle relaxant and neuropathic painkillers so that the pain is reduced. Gentle stretches after subsidence of spasm will prevent this condition to revert.