Scheduled For Fusion Of Vertebeae And Laminectomy. Should I Go Ahead With The Surgery?

Question: I am scheduled for fusion of L2-L3, L3-L4, L4-L5 and laminectomy. Original pain was near tailbone, buttocks, and down both legs toward the back of legs. I got an epidural 9 weeks ago which was my 2nd one. The first one lasted 3 weeks, the 2nd one so far is still working. My surgeon + 2nd opinion surgeon both said I would have back pain forever and to expect that. I want to know why that happens, what causes the pain anatomically. A lot of people say "don't get back surgery whatever you do, it could make the pain worse! Before this last epidural I couldn't stand the pain and was sure of my decision to get surgery, but now that the last epidural has made the pain subside.... I'm not sure I should go ahead with the surgery. Any day now the epidural could wear off and I will be sorry I didn't get the surgery. I keep moving my surgery date and after doing that 3 times they are telling me no more extensions. Does anyone have any advice that would help me make a decision? I have a MRI on a disk, but I'm not sure how to upload to you.