When u get genital herpes why i get this fishy odor is it from the sores or something else?

Possible: Whenever there is any change in the vagina from any infection, the vaginal discharge composition and balance changes. This makes it easier to get Bacterial Vaginosis which causes the fishy odor.

Bacterial Vaginosis: Sometimes disturbances to the natural bacteria in your vagina (douching, irregular bleeding, unprotected sex, etc) can allow abnl bacteria like Gardnerella to overgrow and cause a fishy odor. It's not sexually transmitted, but can be treated w/ Metronidazole(Flagyl)/Clindamycin/Boric Acid. See your GYN for a prescription and be examined for other potential causes. Nothing urgent/dangerous though.