I take Nuvigil, too. I have severe sleep apnea and I use a cpap machine. It helps me somewhat with the exhaustion but I did not notice any change in my pain level with it. I am glad it is helping you!
For the pain I take Lyrica 225mg 2x a day, Magnesium 250mg, Cymbalta 120mg (also for depression), Valium 5mg at bedtime. I take Nortriptyline 20mg to prevent migraines. I also take a multivitamin every day.
To stay awake I take Ritalin at noon and 3pm. I feel like the Ritalin has given me half my life back. Before I started it I was in bed between noon and 2pm every day. Now I can eat dinner with my family and stay awake until 8 or 9pm.