Welcome to NeuroTalk:

There are papers on PubMed about using acetyl carnitine for patients on chemo. The chemo drugs may damage the nerves, and acetyl carnitine which is OTC helps block this damage.

Before having any invasive procedure done, I'd try this, starting at 500mg a day and increasing to 2000 mg daily if needed. Try this for a month and see if it helps.
http://www.ncbi.nlm.nih.gov/pubmed/22271810

Also magnesium may help you too. Cramping and nerve issues may improve some if you are low. Some chemos deplete magnesium as a side effect.

Aim for 1/2 the RDA to start, and use a good chelate type (not OXIDE type--which is not appreciably absorbed).
Also you can try epsom salt baths, as the magnesium will be somewhat absorbed that way too, thru the skin.