I have been pregnant twice and not had an itchy or sore vagina from being pregnant....
You may have a yeast infection. If there is any cottage cheese like discharge then it is most likely. But I have had a yeast infection and not had the discharge. Talk to a pharmaicst or doctor, but you can buy a cream for that like Monostat or Canestin to get rid of it. The longer day treatments are the best.