girlfriend has sore vagina

Ok well about last week (sunday) my girlfriend and I had sex. I have hsv-1 and i have given her oral in the past, now a week later she is complaing of pain inside her vagina. When she told me this I blew it off as just being sore, but now (thursday)..she is still complaining. She told me that i was hitting her stomach or her cervix and she was also complaining of stomach pains so I looked on the computer from some stuff and the article said that pain inside the vagina can come from lack of moisture or cervix irritation. Well now im scared and sh**ting bricks, she says if the pain dosent stop that she will go to her GYN doctor to see whats wrong. She has the flu as of now so there can be alot of things going on. We have had sex numerous times in the past and this is the first time that she has complained about vaginal pain or discomfort. I wanna know if its possible that Herpes is causing this, or if this isnt anything to worry about. Any feedback will be greatly appreciated as i am very concerned about this.