thank you for your query.
I think you are definitely suffering from recurrent vaginal candidiasis
or yeast ) infection.
You need to have a proper vaginal swab and culture to document this, and to record any resistant or virulent strain of candida.
you need proper, maybe even systemic antifungal therapy, if recurrent candidiasis is proved.
You need to have your blood sugars tested, for diabetes
Wear loose clothing.
Avoid keeping the part moist.
Avoid wearing allergic, synthetic undergarments.
Avoid excessive douching, cleansing, vigorous rubbing of affected parts.
Consult your gynecologist at the earliest.