I’m 61 and developed severe SI pain in one day five years ago. My life changed overnight. I had ifuse surgery a month later. It didn’t help. My bones also didn’t fuse. My surgeon then recommended a lumbar fusion, which didn’t help. I Then had an SI Joint fusion revision surgery - partial open procedure with packed bone matter to help it fuse. This time my bones fused BUT the pain has been significantly worse ever since. I never really considered that could happen. I thought I had nothing to lose and everything to gain by giving it a try. But now I’m on 5 x’s the pain meds I was on previously and can only walk for 12 min without a walker. I hate to bear bad news, but just thought it might help you to hear that revision surgery is a very tricky matter. I found out after the fact that my surgeon had only ever done 7 revisions. I wish I asked more questions about the success rate. Anyways, I’m very sorry about your pain. I hope you can find relief.