My Doctor Prescribed Levest 150/30 For My 14 Year Old

My doctor prescribed levest 150/30 for my 14 year old daughter as she has very long periods and struggles with her emotions/anger and said this would help. as we were going on holiday he said she could take 2 packs back to back to delay her period. but this has not been the case, she is now on the second pack with
eight tabs left and she has been bleeding nearly every other day