Chaffing or some kind of rash??

Hannah

Okay here's the thing, I do wear cotton only underwear, but lately whenever I'm walking so much or basically working (I'm a server at pizza hut) I get REALLY wet and some kind of rash or chaffing (you know when you have thick thighs and they constantly rub together) appears on the lips of my vagina. its very painful and I'm too scared to put back on underwear because of the pain. any ideas of what I should do??