It is no surprise that your symptoms started after a course of antibiotics. There are a few antibiotics that are KNOWN to cause small fiber neuropathy...Cipro and those in that class (Fluoroquinolone) are at the top of the list. They actually have a black box warning for neuropathy.

Of course there are many causes of SFN, but being the timing of your symptoms with the antibiotic, it's likely from it. What antibiotic were you taking?