Failed back fusion and chronic pain in back, hip , and leg

I took a lot of XTC in the early nineties, and then had back surgery in 95 that failed. They put in a bone from the bone bank that worked where the hip bone they took failed. I am wondering if taking this drug had anything to do with preventing my bones from fusing. Does anyone have any info on this? I had a 3rd surgery from a cyst, and a fourth one with cages on L2 and L3. in 2000. Last year the floating disc at L4 L5 blew out and they put in a bone graft. it was to much for back to deal with fusions above and below the L 4, L5 disc. Now that bone graft did not fuse either and I am left with lots of pain in back, and right leg, along with my knee. They call it a pseudoarthrosis and my new surgeon thinks he might be able to do a fix on it for me. Would anyone be willing to comment on these issues for me? I really need help, Please?

Stefan