Hello @pepper2001
I can tell that you are very worried about your girlfriend possibly being pregnant. The cramping she is feeling may be implantation cramping, when the embryo attaches to the uterus, or it could be totally unrelated. I would suggest she call the doctors office where she gets her birth control pills subscribed to speak to a nurse or get an appointment.
If she is pregnant, I encourage both of you to talk with your parents. Do you think you could do that?