My girlfriend's period is 2 weeks late and she just keeps getting discharged. she is 17 and a virgin, is there something wrong with her or just stress?

Uncertain.: Reasons for missed/late periods: low body weight, obesity, marked weight ^ or v, over-exercise, endurance athletics, breast-feeding, ^ stress, illness, eating disorders (bulimia or anorexia), anovulatory cycle (no egg released), travel, hormone irregularities, drug use, meds (i.e., birth control) or medical problems. #1 reason is pregnancy.

Please explain: It is important it have more information, such as whether she has ever been regular, the type of discharge, etc. She should see her healthcare provider.