So sorry to hear of your problems , but that is exactly how my PN started. One day my foot felt as though it was on fire. Slowly but surely it has traveled up my legs it almost feels heavy and very tight above my knees. I have trouble walking also, I dismissed it for a few months because I had recently had chemo and radiation and spent alot of time in bed. Today I walk with a cane , cant walk the mall and have a horrible time sleeping, my legs keep me up most nights. I see a neurologist and take meds, they still dont help , just make it livable ... Have you had a EMG.