At seven weeks Post myself,the biggest reason for the bigger panties is SWELLING, and drainage from the sutures that needs to air out. Pantie liners and even full pads these days come with sticky backs on them. If the panties are too tight, they are going to rub VERY tender skin absolutely raw.
Another nasty they don't mention is that you will have shaved your pubic hair, even the stuff you have not had electro'ed, and when it grows back it can poke through the panty material, and be pretty prickley and add to your Advil intake. You are going to see some bruising completely around your waist and below belly button area, and that makes the over skin pretty tender as well.
I learned the hard way but you do not have to -- The cute, sexy nylon and spandex panties that we used for tucking purposes are hell to be wearing especially if you are traveling any distance after the surgery. They keep moisture in and can encourage yeast infections.
BUY cheap COTTON briefs, about two dozen pairs from the cheapest source you can, and then get about two quarts of Hydrogen Peroxide. Change your panties at every dilation, and use the Hydrogen peroxide on the blood stained areas, it gets out the blood and bloody goo, and lets your panties live to wash another day.
