Somehow i feel like dejavu & like i have answered this same question earlier.
What you are describing sounds like a condition called LSA(Lichen sclerosus
atrophicus) or Morphea
For best results though, please do take a good clear digital photo of the lesion & upload it on this site.
Should you wish discretion, please use our 'ask-a-doctor' premium portal to reach one of us & send it privately.
Try using a cream with a combination of betamethasone
locally on the lesion twice/daily to see if it helps.
I disagree that doctors' should be telling you it will go away by watching but each person has his/her opinion & is entitled to it.
Use a healthy sprinkling of KY jelly or any other lubricant before sex.
Wish you good luck & continued good health & dont worry, go visit a dermatologist/venreologist if our Gynec colleagues are not showing a healthy enthusiasm for your problem.
Dr Praveen Rodrigues MD
Dermatologist, Cosmetologist, Venereologist
Vikram Hospital, Bangalore, India