Hi Izzabella,
You are not alone !
RSD is a daily struggle. You need the help of doctors(s) who will work to try and help you minimize your pain and maximize your functioning.
If the Norco helps at all, perhaps a note from the neurosurgeon to your primary will help with a more reasonable order. I'm sorry, but if the pain is severe and constant, giving 2 Norco a day, which only last 4 to 6 hours each (it's exactly 3 hours and 45 minutes for me) is not effective pain management. I'm surprised the docs aren't also adding non narcotic meds that could help, like Neurontin/Lyrica or Cymbalta/Savella/other antidepressants.
Have you tried PT, chiropractic care, massage, accupuncture, TENS, tDCS, etc ?