Peripheral neuropathy

All has been going well, hence I've not been on here for a while.  Husband had three chemo cycles and then started getting pins and needles/numbness in feet and to a lesser extent his hands.  Third chemo dosage was reduced, as apparently it signifies nerve damage which can be irreversible.  No improvement at telephone review last week, so this week's chemo postponed and we see oncologist on Friday to see where we go from here.  He has since developed a small rash on one foot which he reported and acute oncology are happy for hm to monitor, but also dark/black marks appearing on fingernails.  We so do not want the rest of chemo to be cancelled, which is a possibility.  It would be devastating after getting so far without any other side effects to speak of, apart from loss of hair.  Hasd anyone else come up against neuropathy as a result of chemo and what happened?