PS to the OP - I wouldn't use neosporin "down there." Besides having a petroleum base, the antibiotics could encourage a yeast infection and/or resistant bacteria.

For healing spots that are already chafed, calendula salves work well. I have some Nubütte which didn't work at all for me as a chamois cream, but it's really great for healing. Or you probably have a local herbalist who makes a calendula salve.