In the interest of prevention of yeast infections and the like, have you ever made conscious changes to your diet? There's eating yogurt/drinking a lot of water, and also cutting down on high-sugar foods. If something feels off (and it's not due to a health/medication issue), I try these things first.

When I was younger I used to panic and eat tons of garlic, which, truth be told, is not really the sexiest thing one can do.