My idiopathic SFN came on with similar symptoms to what you are experiencing. Last May, after 2 month of unexplained tongue/lip pain, I started having pain & numbness sensations throughout my body. Included with this was a hoarseness and "lump in throat" feeling. I also had pain in the tissue of my upper abdomen. Pressure on my belly would be very uncomfortable. Painful feet was another complaint. I could not wait to get my shoes off at night! After numerous tests (MRI, EMG, lumbar puncture, blood test galore) I was diagnosed with mild SFN following a skin biopsy at Cleveland Clinic. For the most part my neuropathy is under control with Neurontin (1200mg/day) but many of my original symptoms seems to reappear from time to time to a lesser extent. Hope this helps...