You need MORE Gabapentin then 1800. Most with severe neuropathy take up to 3000 mg a day or MORE. 1200, is nothing really compared to the pain you describe and 1800 you plan to increase to isn't much more. You may notice a small change, but you need a much bigger increase (slowly of course, but steady increases).

I honestly don't think your SFN is from the acupuncture, because you went to get the acupuncture due to nerve pain you were ALREADY having. Yes, I think it made it worse but it is NOT the cause of this and you should still try to explore possible causes while you treat your pain. You have been at 1200 mg for a while with no increase. Your GP is not a pain specialist or neurologist. You need to see a pain mgmt doctor or get your neurologist to properly treat your pain with larger doses of Gabapentin. Other drugs can be used with Gabapentin as well...but you need someone experienced in prescribing your meds.