Hi Nayshaw, First google Vulvodynia, its what you have got,
swelling of the
vagina, vaginal juices are acidic, problems from what you eat.
try changing you underwear more often and use cotton.
Never sleep in your underwear.
Only wash in clear water, never use soap as this upsets the vagina natural orgasms.
Eat good plain yogurt so it gets into your system, but I think you could try and smear some in the vagina, may work quicker.
Do hope this helps.