filipe you're lucky that someone ordered a skin biopsy for you. i have been trying to get one ordered for me for a while but no doctor wants to order the test. as far as it being small fiber neuropathy i hope your biopsy comes back normal and it turns out to be something simple. if it does turn out to be small fiber be as aggressive as you can to find out whats causing it to prevent further damage. hope its not tho. you're absolutely right your son needs you to be healthy to take care of him.