ATN pain returning right after MVD surgery

About 10 days ago I underwent MVD surgery for my ATN pain (pain over eye and bridge of nose). My surgery pain is fading, but my neuralgia pain is coming back strong. I have been taking a lot of Percocet to soften the pain, but it is barely working. I know my odds of success are not the best for ATN, but I felt like I had no choice. The pain was so bad I was going to the hospital 2X week for IV's to stop the 10 pain. Should I be freaking out about the return of pain so quickly, or should I just keep taking the drugs and hope that the nerve calms down? Has anyone with ATN experienced such a quick return of the pain?