I had it bad last week- was not a YI, but probably from an allergic reaction rash that I got EVERYWHERE! I used Vagisil wipes, and they helped out tremendously.
I would call your ob. It could be a Yeast Infection, but I have also had terrible itching from being allergic to my soap, and it came out of nowhere. Either way they could probably recommend something for you That feeling is the worst I am sorry.
Re: itching problem - TMI