As we don't yet know your history, it would probably be useful to know what your medical team have actually tried you with so far. I have a friend with non diabetic neuropathy caused by spinal conditions and someone said to her last summer, Ever tried pregabalin, Mic? so she asked her medics if she could try em and although it took a couple of months to help at all - she told us late last year she thought they were helping, we don't see them at all during the winter and next time was Easter this year and they've been helping considerably including lots of digestive problems with all sorts of different foodstuffs in the past (I mean tolerances apart from her coeliac disease ones, although she is now at least able to digest gluten free bread, which she absolutely couldn't before! She said to me at Easter, Oh Jen! my sheer delight in being able to really enjoy a flipping sandwich - it's truly wonderful!)
I think - the same as finding which insulin(s) suit our own body - nerve pain is kinda the same - often we really do need to kiss one helluva lot of frogs, before we find our prince!