Thank you all for your ideas and input. I appreciate getting your opinions and experiences.
I guess I'll continue to trust my instincts and stick with the warmth. Not that it gives me relief from the PN pain, but it gives me relief from the bitter cold feeling. Perhaps it's psychological, but heat makes me feel slightly better.
Mrs D..... I'd not heard of RSD before, so read up a little. Very interestingly similar to PN in many ways. Overall, I don't think it suits my symptoms because I lack any sort of skin condition or muscle weakness. My symptoms are worse at night and fit more with PN. However, when I see my GP in a few weeks I'll run the idea past him next time he runs blood work to check for it. Thank you for pointing it out as I'm definately still open to ideas, no diagnosis here yet and not seeing one in the near future!
My GP is almost at a loss, suggesting we consider Plantar Fasciitis, so I'm humoring him by strapping, wearing arch support, etc. My Neurologist is done with me, she has no tests left to run. I'm going to request a referral to Podiatrist next time. With this condition slowly, very slowly getting worse, there will come a day I cannot work at all and will require G'vnt assistance. When that day comes I need a diagnosis!
Thanks again all.