Sometimes more surgery is not the best idea on top of the old injury. I have a friend who had a fusion 5 years ago and now she is again in Pain just above the fused part. she is not looking into more surgery but more alternative physical therapy. Perhaps you may have to go 360 degree, and look for alternative especially if you cannot afford more surgery. I would think about why the pain is returning. ie posture, muscle pain, acquired scoliosis and sciatica, look at yourself in the mirror, shoulder positions, hips ??. I would start an intensive search for other ways to get out of the pain, I would become a treasure hunters for back relief.... I would suggest a excellent book call "pain free" by pete egoscue and if can't afford the therapy, search the book and try everyday some stretching, to see what helps. I would also look at trigger point therapy ( clair davies). ( it is doing wonder for me ) I would look at postural yoga for back pain. I have 3 bulging disk and basically I am working on all kind of natural technic to get out of my pain. It is time consuming and hard work, but I am hoping for results soon. I had 7 month of neck pain, on top on my sciatica and back , and now with 3 month of neck therapy ( with egoscue, treat you own neck MC kensies, yoga for scoliosis) I am getting really close to be pain free. I know it is not easy, and I am like you, I want the quick fix, but right now, I am stuck with this, but I hope I will find a way. I believe the body wants to heal, if given the right tools. that my hope anyway.
hope this help virginie