OMG I am so happy I found this post. I was just telling my co-workers and my friend that for the past 4 days I get so mad at work. I get really annoyed,angry and super bitchy.... which is so not me. I mean everyone is always saying what a sweet girl I am blah blah blah."Well I have felt a total 180 and I have only been on Yasmin for a week! Is it possible for it to kick in so quickly. I mean I get really angry so angry that it had me trying to figure out the root of this "new found evil" side of me lol. But I am going to call my GYN tomorrow and demand a new medication. It's making my life unbearable and hits me worse the minute I step into my office... (granted going to work isn't fun) Now I also notice I have been very sleep. I have been sleeping fine at night but no matter how much sleep I get I am sleepy. Has anyone felt this? I used to use some other BC I think something called lo overal and i was fine, I loved it. Anyway I am very grateful to have read these posts.