I have been taking YAZ for about 4 months. I hate it. I am 23 and started taking yasmine when i was 17. Before that I had 2 week periods with very severe cramping. It would cause vomiting and diahreah. I stayed on yasmine for 4 years and I was extremely happy with it. When I was 21 I had a lyproscopy and was diagnosed with endometriosis. It is the cause for my severe cramping and heavy periods. I then was on a shot called lupron for 6 months then started lo estrin. Hated that, switched to YAZ. My symptoms include weight gain, acne (which i have never had) on my face and chest, severe breast tenderness (felt like my nipples were being pinched with clothes pins or something), extreme mood swings (i spend hours crying and being angry), so tired, depression, intermitent nausea, dehydration, fatigue etc. I also have not had a regular period since beginning. My last official period was in November, I then had some spotting and then I had no period for about 10 weeks. I tested over and over for pregnancy but I was not. I finally had a period and it was like i was 17 again. I am just miserable. The ONLY positive is that I gained a cup size!! I was a 34A now I'm a B! I asked my doctor for yasmine but she said she wanted me to try yaz because it has a lower estrogen dose which is favored for endo. I don't care, i would honestly take longer REGULAR periods instead of feeling crazy. I am going back to yasmine. I like my doctor but I will find a new one if she won't help me. YAZ and Lo estrin 24 were both horrible!