I feel your pain. The second neurologist i saw is a SFN specialist and he dismissed my symptoms as well. I trusted him until my toe went numb. Push for the skin biopsy and I pray it comes back negative.

Side note, I also understand your concern about your wife and future child. I have 2 children (1 & 3 years old). My daughter was planned when my doctor told me it was BFS and nothing to worry about... Now with my SFN diagnosis, I worry about how i will take care of them if this progresses. My wife does not make enough to sustain our family. This bothers me more than the disease...

With that said, it might be a good idea to get/increase your disability insurance prior to a skin biopsy. This way you lock in your rates at a low amount, instead of paying a premium or getting rejected post diagnosis.