"been on this birth control now for 4 months. it works well as it prevents pregnancy, but so far, i&#039;ve had very heavy periods and severe cramps and tons of chin acne. yaz never gave me these issues. i want to switch, but doctor told me to give it another 3 months to see what happens. if i still don&#039;t like it, then she said i can switch. i must stick it out until then."