Hi. I understand that you are scared to have the spinal fusion surgery. I had s1 L4 spinal fusion 2 months ago. I had a slipped disk which was pressing on a bundle of nerves and that was causing terrible pain on the inside of my thigh.
Do you trust your surgeon? Are you in severe pain? I had an excellent surgeon who is still very responsive to my questions and concerns. The inner thigh pain is much better - not completely gone but nothing like the feeling of knives slashing my thigh. Of course I can't suggest that you have the surgery or not. It hasn't been a difficult recovery but it will be a long one. I was told by 6 months I would be recovered well but full recovery takes a year. You will be very limited in what you can do for most of that time - no bending, lifting over 10 pounds and twisting. And I have been told that my range of motion will change but I felt I had to get out of the pain I was in and that was the only way to do it. My pain began in May - horrible chronic pain - every second of every day- and I couldn't walk without a cane. I'm going to aquatherapy to help my recovery.
Good luck.

I know exactly what your having.
The problem is your SI joint has lost its ability and you are having bone on bone. What SI joint fusion it stables the joint. I know what you have gone through. I had no where go to get it done. 😩 Mayo Rochter help me out. They are the best. I couldn't find anyone to help. If you trust your doctor GO FOR IT. Good Luck