"i have been on yaz for over a year now. at first it was great, my skin cleared up, my periods were regular, light and short and my moods varied only slightly. after about the first 5 months however, everything started going wrong. i have constant heartburn, i&#039;ve gained 10 lbs., i&#039;m tired all the time, my acne has returned and i&#039;ve been spacey and forgetful. worst of all are my periods. the week before and throughout my period my moods are all over the place, i&#039;m irritable and easily upset which isn&#039;t like me. i&#039;m getting severe cramps, migraines and i get really nauseous when i&#039;m on my period, which are heavier now than they ever were and last usually about 8 days, last month it lasted 11! everyone&#039;s different, but this isn&#039;t for me."