I hope you don't mind me butting in - but I am going to warn you of something. A pain management doctor will more than likely not be able to keep your pain at zero. That is not their job. The job of a pain doctor is to get your pain to a level that you can tolerate. I have very similar problems to yours having a ruptured and fused L4-L5-S1, with pain down both legs, degenerative disc disease, along with post surgery scar tissue causing their own world of trouble on the nerves running down my legs.
Just keep in mind that their job is to help you manage your pain - not get rid of it. Going in if you think that you are just going to get a magic pill regime and everything will feel great - you are going to be greatly disappointed.
I do wish you the best of luck though - and I hope they can get your pain down as low as possible.
"When we come to the edge of the light we know, and are about to step off into the darkness of the unknown, of one thing we can be sure; either God will provide something solid to stand on... or we will be taught to fly.'"
"Cause when push comes to shove You taste what you're made of, You might bend, till you break Cause its all you can take; On your knees you look up Decide you've had enough, You get mad you get strong Wipe your hands shake it off, Then you Stand" From "Stand" by Rascal Flatts
Dx.: Polycystic Ovarian Syndrome, Ulcerlative Colitis, Chronic Inflammation of the Colon, Ruptured & Fused L4-L5-S1 w/pinched nerves, Degenerative Disc Disease, Chronic Costochondritis, Back Muscle Spasms, Asthma, Benign Tremmors (hands)