Hi I Had Back Surgery In 2010 With Complications I

Hi I had back surgery in 2010 with complications I was prescribed oxycotin and Percocet I then had a spinal cord stimulator installed in my back because the doctors told me I have a awful lot of scared tissue I had that done on 3/24/2015 which they prescribed more pain meds. my problem is I've been these last few days to try not to take them, but i'm finding it very difficult not to take them my waste starts hurting and my stomahe is a mess. what can do to stop this agonizing feeling?