Hi there,
I suffer from RSD, and I experienced similar problems to you from a nerve block (but it was a Guanethidine block not an epidural) the block made me lose my balance (I have still not got it back) and it made the pain worse.
No you dont have to have another block if you dont wish to, your PM doctor will ask you what you want to do.
Not sure what sort of medication your PM doctor will prescribe - that is up to him - but you should get a say in it.
Say to your PM doctor that you are unable play with your grandchildren, I'm sure he will understand and try to get things better for you.
I know how you feel about people thinking that you are a drug addict, I'm sure people think that I am one, I am sick to the eyeballs with it.
Let me know how you get on
Pain free hugs
Alison