What Is The Treatment For Extremely Itchy Vagina?

I am a sexually active 20 year old woman. Lately I've been feeling extremely "itchy" on my g-spot. It feels better if I scratch or even stick my finger in there (I guess that's considered scratching too). Anyway, it's been about a week and a half and it has not gone away! No odor, no funky smelly discharge, no physical changes and I have not changed anything about myself or have taken any antibiotics. just EXTREME ITCHINESS! How do I make this go away? Please help!!