I have this itch sometimes i have discharge i got tested for all std and it was negative i do have herpes type 2 can that be the cause?

Probably not: What you're describing can be seen in various conditions including bacterial vaginosis and vaginal yeast infection. It is unlikely that your symptoms are related to your history of herpes . With herpes you would have symptoms of soreness tingling or visual lesions. However with all this said i would recommend that you see your gynecologist to confirm why you have what you have. Good luck.