Just a quick note to say hi! I am35 years old and I have the same sympyoms.I olso make use of dactacort cream and same thing happen to me,the red rash and thiny spots come and go.As you already said I olso thaught of std but a year ago when I've made all the tests you have already metioned doctors found nothing ie everything normal.I would be very greatful if you inform me what happend after cause im getting woried about it! did they found what the real problem was.Thankyou- roller