This Yasmin pill seems to be not all its hyped up to be. I am...

This Yasmin pill seems to be not all its hyped up to be. I am on my third pack now, and although it has taken away my period pain, I get prolonged periods (longer than 8 days!!), and my mood swings are unbearable. Also, I don't know if this is just me, but when I go out into the sun to get a tan, I develope a very patchy tan. And it seems to go dark above my lips and on my chin. It looks terrible. I have never had this before, I am naturally olive skin coloured, but ever since I started this pill .. my self esteem has dropped. I must note tho, I have lost about 4 kg since starting it... that can't be a bad thing. Thats all.