could be thrush ( sp?) did the doctor give you any idea at all what it could be? cant say it sounds right to me... try natrual yogurt just incase ( eat and as a cream to sooth the ichyness)
he seems to think its just me being very sensitive as i've had extremely itchy skin all over... at least on the rest of my body i can scratch (yes i know a bad thing anyway LOL) but i can't walk around scratching down there