I Have Had Vaginal And Anal Itching For Over Two

I have had vaginal and anal itching for over two months have been to a gynecologist every test in the world and nothing is wrong. He gave me all kinds of creams and they don’t seem to help the latest one is CLOTRIMAZOLE and belamethasone Should I see a dermatologist. I also have been taking baths with baking soda using ice packs and taking Benadryl what can I do