You just got a low tolerance to all pain medication, whether it be opiate BONE pain meds, or nerve pain meds such as Lyrica or Neurontin. I don't feel crap off Neurontin.
they will compliment each other. lyrica and gabapentin are safer alternative potentiators to benzos because they produce less respiratory depression too. however, i find lyrica and opiates to almost be better than benzos + opiates.