T.F.
Call the dr and possibly get a different pill.
The hormone level could be too high or there could be an ingredient she's more sensitive to.
My daughter is 19 and has been on the bc pill since age 14. Her periods were nonstop and cramps were so bad that she would miss school. It took 2 different RX to get the right match for her and things have been ok ever since. She takes the pill at the same time every day and not on an empty stomach.
Good luck.