"i have been on this birth control regularly for almost a year now. i am very sensitive to the hormones and experienced extreme sickness i mean to the point i was throwing up every morning and on the verge of passing out no matter what i tried to prevent it. i learned that taking it in the morning solved this problem. negative side affects are that i have a huge appetite (thankfully a high metabolism) constant headaches, worse pms, no motivation, tiredness, irrational mood swings, and last week i noticed breakthrough bleeding and cramps halfway through the pack. but all in all my periods are short and i&#039;m not pregnant yet! remember every woman is different."