I have an itchy rash that looks like a heat rash on my outer labia and inner thighs. I have been applying the anti-fungal cream that is part of the over-the-counter yeast infection treatment. It is seriously driving me crazy though and the cream does nothing for the itch. I am worried it is not a yeast infection or heat rash. Are there any tell-tale signs that it is...or may be something worse?