Ulcers just appeared a couple days ago on my vagina and the dr says its due to herps but i haven't had sex sincemarch so how could i have herpies

Herpes virus: The family of viruses that include herpes are never completely eradicated from the body. After the initial infection, the virus goes dormant, often in nerve roots. A variety of different triggers can then reactivate the virus and cause symptoms, like the ulcers you describe. It will be vital to tell you OB if you become pregnant of this, as it can be passed to newborn and be fatal.