"my experience was complete hell. i used to take tri prevefem which has different hormone levels and so on. the reason why i switched to this kind is because i missed 1 day of the pill because the first day i forgot to pick up my package (tri prevefem) from my pharmacy .. but they didnt have it the next day i went to go get it and i got this kind  (i thought nothing of it) so i doubled up. i took sunday and mondays pill to catch up like i was supposed to. the next morning i vomited everywhere. the hormone levels in this pack are crazy. i know i vomited because my body wasnt used to this hormone level. so just fyi if you switch contraceptives and you double up on the pills beware of the craziness."