Do not panic,use antifungal cream.
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Vaginal fungal infections are more common during pregnancy
as the PH decreases to 3.8 to 4.0,as this allows the development of candidial and other fungal infections.
As it usually seen on the mucosal side of vaginal, you are not able to view any visible swelling on outside of the skin.
Do not worry, just usage of anti-fungal creams like 1% clotrimazole
If you still had profound itching and swelling visiting a nearby gynecologist is advisable.