Hi Kavita nothing to worry just deworm your self and the itching will subside. It happens some time due to worm infestation. and if it still does not go then plz show to same dr for best as she can see if there is some piles or fissure as this some time leads to itching and burning or may be your vaginal infection
has taken new path to your anal region. by that time apply some antifungal cream and deworm your self. bye and take care.