Good luck. My sympathies to anyone with nerve pain. ESI's provide a lot of people with relief, without many drawbacks. It's teh correct first step if you have a significant amount of chronic pain. Did not work for me, and unfortunately seemed to elevate my sciatica from manageable to absolutely intolerable. I have several disc bulge's with one at L4 L5 pressing on my nerve. I have lightening like pain from my left glute tot he my heel. I have been too busy with my wife's health issues, my business and children to properly chart a non-surgical path to recovery. I am fortunate to have found relief from Gabapentin and then Pregabalin. There is a cost, but I am relatively comfortable at the minimum dose available. It's not a long term solution though.
I'm going to start decompression and acupuncture this winter and get serious about McGill's Big-3 exercises. The physician's in my personal life all recommend against surgery. They are friend's and clients, not caregivers. I hope I dont get to the point where surgery is the only option for potential relief. BPC-157, TB-500, GH don't seem to help. I'm always worried it.
Again, good luck and may you have complete relief.