I have multiple back issues. I have had one epidural. It was wonderful. Pain free for about 9 months. I did the physical therapy afterwards. I have had chiropractic, acupuncture, etc. The shot was really no big deal. I was so anxious to get some relief. Go into it with the idea that you will be better afterwards. It will take a few days for the medicine to made a difference.
Currently I am trying to lose some weight to help my back. There also is a book, "Treat your own Back," by Robin McKenzie. About $10 on Amazon. One of my joint doctors recommended it. When I was having severe enough issues I was having trouble walking, I had a therapist who used a lot of the exercises and stretches from this book. It worked wonders.
I try to avoid the triggers. I do have pain pills for when it's really bad.
Good luck.
Dale