what is a good remedy for a fungal infection

I have a skin break out and I’m pretty sure its fungal. In the folds of my skin such as under my breast and my panty line my skin is delicate. As a after washing routine I always put an unscented sensitive skin powder on those afflicted areas but recently I’ve noticed a bubble like raw patchy area that is greyer then the surrounding area that tends to itch purfusely. Please I need some help on this