Hi, I Had Sex But I Was Fine Then I

hi, i had sex but i was fine then i went to the beach and then had a yeast infection, because my ladia was swollen and irritated, and I discharge (white) and then i use the 7 day treat meant but then i did have to the 7th day cream so i bought the egg but i think that was too strong and now my vagina has a perfumey smell is something wrong???