I started taking YAZ in May 2008, after I told my doctor that I wanted to regulate my period (basically because I was going on scuba diving trip and didn't want to have my period) - I also told him that I was kind of b*tchy lately and maybe there was a pill that could help that as well. He prescribed YAZ - I went on my trip, no period (very light periods also)... In September 2008, I went to a cardiologist for heart palpitations, chest pains, shortness of breath (never thinking that YAZ had anything to do with it). After a huge array of tests (cat scans, blood clot scans, blood work, stress tests, etc...), he didn't find anything, but advised me to take 1 baby aspirin per day. About a month later, I started getting dizzy spells. I stopped taking the aspirin, figuring that's what was causing that (still never thinking about the YAZ - basically, because I had never had a problem with any other birth control pills). I took my last YAZ in January 2009. It seemed that my ill conditions slowly stopped.... Then, last week, in June 2009, I bought a pack from my almost expired prescription because I was going on another scuba trip and my period was scheduled to come when I would be away... I took a pill on Wednesday, Thursday, Friday, Saturday, Sunday (got my period, but it was very light), but by Sunday, I was so dizzy again, I could barely stand up. That was 3 days ago; still dizzy, but I'm writing off YAZ for good - it seems like that was cause of my health problems and it really isn't worth it just so I can plan a vacation around my period. I will be looking into alternatives to YAZ - I would advise if you have any of these symptoms, to do so as well.... Good luck! L....