Hello,
Cat allergen, the allergy causing material from cats, is not cat hair, but rather a protein present in the dander and saliva of cats.As you had skin symptoms after coming in contact with the cat,so allergy to cats cannot be ruled out.In the last trimester of pregnancy,cat allergens cannot pose a direct risk to your baby but it may effect fetal well being by causing allergy symptoms like skin symptoms,hives,itching,respiratory symptoms to life threatening anaphylaxis in the mother.
I would suggest that you get rid of the cat as far as possible.If not possible then,use reputable allergy avoidance products throughout your home. Wash your hands after having contact with the cat and keep pets out of the bedroom and avoid using carpeting, draperies and upholstered furniture in your home since allergens will collect there.
If the symptoms persist then antihistaminics and allergy shots may be needed.
Hope it helps.Take care and pls do keep me posted on how you are doing.Kind regards.
Allergies have a genetic basis but not always to the same allergen. Two parents with allergies (50% chance of developing allergies), one parent 30%.
It is possible that it is an allergy, however make sure the cat wasn't bathed with anything, I reacted with hives once to the shampoo I used on a puppy at work.