I have the same sensation as you. I see many of the members here have been diagnosed with PN, and then the diagnose change at a later stage. My doctor has diagnosed me based on my description of my pain. As I told her: without my painkillers (Methadone 20 mg) it`s like standing bare foot on ice unable to move. At first it`s really cold, then the feeling change into a severe burning feeling, combined with numbness. It reach 8-9 on the pain scale quite fast.
The strange thing is that my feet is better in the morning. It takes about 2 hours to become unberable.