Thanks for asking question at healthcare magic.
I have read your complete question.It looks from your details that you have severe back pain
& you are also having old history of epidural injection.
There are othere case reports also with disc prolapse
after epidural injection-
In your case this may be the reason for your present back pain with radiculopathy
At present you should take a good anti inflammatory analgesic
& take bed rest for relief.
Hope this all will help you.
With best wishes.