Welcome to NeuroTalk:

I'd try and increase circulation to your feet. This can be tried by soaking in epsom salts twice a day using 4oz to a pan of lukewarm water for at least 20-30 minutes.

Magnesium improves blood flow by relaxing blood vessels. It also blocks the NMDA pain receptors that send pain signals.

Cancer and chemo may damage the dorsal roots along your spine. They are listed as culprits for nerve damage there.
It is pretty well known that acetyl carnitine helps prevent Chemo damage for some people, and it is a bit late for you...but I'd try it anyway. 500mg a day in divided doses to start and increase weekly to 2 grams (2000mg).

http://www.ncbi.nlm.nih.gov/pubmed/22271810

http://www.ncbi.nlm.nih.gov/pubmed/17696592

Acetyl carnitine helps with mitochondrial damage to the nerve cells.

The magnesium soaks will help with your restless feelings in the legs as well. As the soaks start to work, opening up the blood vessels, you can add in oral magnesium supplements (avoid OXIDE form as it doesn't get absorbed).

See how this works in the first month.