Ivig Best Treatment?

I was diagnosed with a fairly severe case of GBS last May 17th. I’ll never forget that day. Any way 7 months in hospital(s) and 2 in a rehab facility and now back home still in rehab(out patient). I can walk now using AFO’s and a single crutch. Use a w/c for long outings. My only remaining pain is in my hands and feet and that pain is substantial. I’m told I had an IVIG treatment and followed by plasmapheresis. Like many of you I had nearly full paralysis for a time.
My question(s):

It seems that some go thru several IVIG treatments. My neurologist has never mentioned additional treatments. Does it make a substantial difference?

My hand pain/numbness gets pretty severe at times and makes the simplest task nearly impossible. I take 1200mg of Gabapentin 4 times a day. I’m told that’s a substantial dosage. What might be alternatives?

Thanks
Wayne