Plz help tmi

So I have had my period for 6 days now and I think it's finally over. But I use tampons and tampons only. For years this has been fine, but this time my vagina is a little swollen around hole and red. No discharge. In fact it's super dry and hurt to use the tampons. So glad I don't need one in now. But this has never happened before! Why is my vag all irritated? And super dry ? ;( sorry if it tmi