Vaginal Swelling

So ladies i'm having some problems "down stairs" and i need some help. i haven't had sex in 2 or 3 weeks, my vagina is very swollen, itchy, and it hurts so bad. i have white discharge and funky smell for 2 days now. what could it be? i've had it happen before and i waited it out but this time it's even worse. what should i do?