A painful and itchy rash on the vagina during pregnancy can be caused by various factors such as hormonal changes, yeast infections, or contact dermatitis. To find relief, you can try using over-the-counter creams or ointments specifically formulated for pregnant women, wearing loose-fitting cotton underwear, practicing good hygiene, avoiding irritants like scented soaps or perfumes in that area, and keeping the area dry. It's important to consult your healthcare provider for a proper diagnosis and treatment plan. Remember that discussing these concerns with your husband is essential for both emotional support and understanding. Open communication will help alleviate any worries or embarrassment you may have.