Maybe it's just a yeast infection!
In anycase, try wearing cotton panties--not the cute little things- like satin, silk or whatever!
hehe I know, NOT sexy, but it might help it go away. Also, eat yogurt to help replenish the healthy flora/bacteria to get it back to balance. Also, if you wash with soap down there---it causes the pH balance to get thrown off---creating a foul musky smell amongst other things. My OB told me to just wash down there with warm water when showering as it should be sufficient enough--and guess what---it really works!!
I know TMI! lol Also take into consideration the weather---eeeek! Great breeding ground for yuckie stuff!
There are a lot of little things you can do---hope these help!