Oh gosh, sometimes this type of irritation is not always vaginal in nature. UTI can also cause the same symptoms.
Maybe check back with the doctor to make sure all is well. If so, then work from there.
Wear cotton underwear. Hemp will work also.
Keep area very dry. In fact after shower use a blow dryer (low heat) to really make sure area has been dried before putting on clothes.
If it is bacterial vaginosis, Sometimes it is treated with, unfortunately, metronazidole (flagyl) which, will also cause yeast infections. If this is the case, take some Culturelle or other probiotic (strong and live ones yogurt won't do the trick) one hour before the dose, or two hours after the dose.
I will check further into this, unless someone pipes up. BUT, just to be sure all is well, maybe a check up with a doctor would be good?
wanderingherb