Pefume has a high content of alcohol. Spraying alcohol onto mucous membranes (like the soft moist flesh down there or the inside of your mouth) makes it sting. This is normal.

If you are smell you are better off just giving yourself a good wash, wear cotton undies and if you are itchy or notice a disharge go see a doc - might have thrush.

it is pretty normal to smell a bit when you are a girl.