Can I ask why you choose not to do surgery and what your back issues are?
I have a 10mm slip of L5 on S1. I have severe bilateral narrowing of the nerves and stenosis as well. I deal with left leg pain/numbness and creepy crawlies and back pain every day. I take Ultram 50mg 1-2x a day and that doesn't cut it as much anymore to go to sleep. I tried the PT but we all know the results of that and he worries that doing the shots will allow me to do more and since I wont feel the pain that I may hurt myself worse.