Itchy vagina. no stds.no discharge or smell.been itchy for 2-3 months and doctors can't find anything.just started birth control 2 months ago. cause?

Yes: Vaginal itching without discharge can indicate infections like yeast or stis like herpes or an allergic reaction to household products like certain soaps & laundry detergents. Some skin conditions liked lichen sclerosis can cause vaginal itching. Testing and exam is key. Over the counter Prevaleaf Soothe is a great product for this common problem. A biopsy can help make the diagnosis.

Possible dry mucosa: Have you considered dryness of the vagina? Depending on your age, their are varous reasons for skin/ mucosa dryness.