I have been on YAZ for about four months. It has been a horrible experience with me. I use to be a happy person. Now I am the totally opposite where it is effecting my relationship with my family as well as my boyfriend. To the point it is driving them crazy. The slightest things will make me snap or I would take things the wrong way. It started the second month taking it and I thought if I keep taking it my body would get use to the hormones. I was VERY wrong. It has been worse. Also my periods are still not regular as well or if I do have any at all, they are light which is the only PLUS for YAZ. I am also experiencing MAJOR weight gain, I have gain 20 pounds more than I was before I was on it and my eating habits and exercising habits have no change. After this last month of depression, moody, and just being tired all the time I have decided to make another doctors appointment to get switch off a YAZ. YAZ may work for some women but not all, so be aware to what it does to you as well the people around you.