I know birth control pills affect everyone differently, this is what happened to me. I started taking Yaz in January after being on Yasmin for 6 years (I had severe abdominal pain on Ortho Tricyclin and Yasmin gave me immediate relief. I had PMDD the last 6 months I took Yasmin and asked to switch to Yaz after seeing commercials on it, other than that I had no problems being on Yasmin for 5 1/2 years). The second month of Yaz, my PMDD went away, I felt normal and loved being on Yaz. I haven't had any weight gain, have mild cramping about a week before my period starts and my period is about 4-5 days and I hardly get bloated but I get a severe headache the day my period starts. The last 3-4 months, I've noticed I've had no energy but still try to exercise, I feel so tired no matter how much sleep I get, at times I don't feel very alert and have to focus hard when driving, have bouts with feeling depressed, and occasional constipation. I didn't have any vaginal dryness but often felt like I didn't have the energy to have sex. I had a blood screening last month which came back normal, this month I noticed my hair seems thinner. I suspected Yaz was the problem then I knew for sure after I found this website. My OB/GYN called in a new prescription for Yasmin today, I'm hoping that will help again - at least until I see him in a couple months, and that the PMDD symptoms do not return.