I've been on Yaz for over a year now and have found it very compatible with me. The only question I have is towards its effectiveness. Doctors tell you to take it at the same time every day, but does it matter if it varies by, say, two or three hours? I take it right when I wake up but sometimes the time varies on when I have to wake up for school. This only became a problem this school year because some days I go in for class at 11, and some days I go in at 8. When I start my next month of pills should I switch to taking it at night (I generally go to bed at the same time) or does it truly matter? I really do depend on it to be as effective as possible because my boyfriend and I do not use condoms, although he does withdraw every time. Thank you!