Hi i am Dr Ahmed Aly  
  thanks for using HealthcareMagic site ,
I had gone through your question and understand your concerns ..
   I hope you feel better soon , in my opinion i think you need to remove it if you felt no progress in your pain sensation .
   You have mentioned that the neurostimulator have caused additional pain and you have had 5 previous back surgeries so may be it need to be reassured if not working properly and if it really cause extra pain so i think you may need more than one neurosurgeon point of view and remove it .    
Physiotherapy , hot massages , 
yoga , spinal straightening exercises and the avoidance of heavy lifting , over weighing , vigorous movements , bad sleeping and sitting postures and maintaining a healthy lifestyle and meals are of best results of 
low back pain patients .
   You may use painkillers like 
advil tabs when needed , gentle massages with topical gels of anti-inflammatory , B12 vitamin supplements , muscle relaxants will be effective for most of cases , 
steroid tabs or injections are prescribed in more severe cases .
   If your pain persists i recommend a new 
MRI and CT and follow them up with your 
neurologist for proper evaluation and management . 
Please click and consider a 5 star rating with some positive feedback if the information was helpful. Wish you good health,
Any further clarifications feel free to ask.