Hello Carole,
Sorry about your new diagnoses and what you're going through. As for pain medication, I can tell you from my own experience I have tried the two you mentioned plus others.Nothing worked for me. I also was diagnosed recently and the neurologist confirmed it. She started me on a taper dose of corticosteroids for 12 days, then I start a new medication Trileptal the following day after my last dose of steroids the previous day.
As with any condition and medications, some medications work for some people while they don't work for others. It really all depends on our body's response to the medication we take and it's different from one person to another.
About another surgery, I really can't say anything about that.
I wish you the best and hopefully you'll end up with the medication that works in your system.
Take care and have a serene afternoon and evening,
gus