More then likely she isnt pregnant....but it depends on when she doubled up her pills. Was it a few weeks ago? Or was it just recently......like within 5 days? Sperm can live in the uterus up to 5 days I heard.... Women also ovulate at all different times. She should still be cautious......

I know a few friends of mine that missed the pill just a day.....and got pregnant.. Thats why always wear a condom in addition to the pill.