How To Treat Itching,burning Sensation And Thick White Deposit On Vulva?

i've had several yeast infections since october and taking the diabetes med invokana. i had an itch and used monistat for itching and when i looked at my vulva with the mirror i saw a white film around the edge looked like a very thick cottage cheese would not come off when i washed with the cloth i used a soft loofa, it was also under the skin of my vulva i had to pull the skin back. what could this be not burning like the yeast infection. thanks