Ive Been going through the same exact thing i went to the Doctors and they gave me an Ointment but i think you should go check it out and i might start useing the diaper Rash cream to also help with my Burning also. Hope you get well cause i know the pain your going through.
Sounds like thrush, you don't have to have discharge or itching. I used to use nice perfumed soaps in the shower but one day it gave me thrush and now I can only use baby's soap so try that, but you will need to still get the pill and cream to get rid of it. Changing soap is only prevention, not cure.
all those things.. yogurt' water and cream will help yes but wouldnt u rather get checked out and c what xactly ur treating. avoid soaps and bubble bath also as they can cause further irritation. you mayb have thrush or u urine infection. you should really c ur doctor. good luck. hope this helped