Allergic to cats/get hives. Just had sex with man owning a cat. Vaginal labias are extremely swollen and look a bit testicle-ish. What should I do?

Unsual situation. It is an unusual case, I have never seen in the last 38 years of experience. I would think that it could be due to contact with some allergens. If condemn was used, latex allergy needs to be considered. Wash the area repeatedly to eliminate any existing allergens.