Certainly, chemotherapy can cause neuropathy--and it doesn't always improve markedly once the therapy regimen ceases. B12 deficiency can cause neuropathy (and I imagine if you have had B12 problems, having cancer and chemo would have exacerbated them--and you will probably need to supplement for life, and not just with periodic injections, but orally and every day). Cancer itself can cause neuropathy, and that also doesn't always go away entirely post-remission/control, especially with the blood cancers, as the rogue antibodies manufactured in many of these seem to cross react with many components of peripheral nerve, and the antibody titers may linger . . .

Sounds like you need a very comprehensive work-up from a neuropathy specialty practice, and to have such a place take all of this history in account for testing.

Welcome to NeuroTalk:

Some supplements that help the mitochondria of cells have been used to reduce PN from chemo.

The major one is acetyl carnitine.

Others to add on would be CoQ-10 and r-lipoic acid.

If you search "chemo" on our search function at the top right of the page on the main index for PN, all the posts will come up including the PubMed articles.

Here is one to get you started:
http://neurotalk.psychcentral.com/post653568-5.html

Also having 5 children is very hard on women in general metabolically. Another nutrient you may be very low in is Vit D.
So please take Glenn's advice and have testing for both Vit B12 and Vit D. Bring your number results back here, if your doctor says "normal"...because low levels are outdated in U.S. as normal.

Also thyroid functions may be low after pregnancy and low thyroid can cause PN ..so having good testing for that is important too.

Pregnant women use alot of essential fatty acids like DHA to donate to the developing baby's brain and nervous system, and the mother may become very low as a result. DHA can be supplemented OTC, and a product exists for this called Expecta:

http://www.enfamil.com/app/iwp/enf10...natal3/ForMoms

This Omega-3 fat is in a couple of prenatal vitamins, that some informed doctors now give during pregnancy. But the vast majority of women do not receive them. DHA is in fish, and also made by your body from the essential fatty acid found in Flax.
If you did not consume foods with this added (we have smart foods around now) you would be deficient and your nervous system would suffer as a result.