Emotional effects of Yasmin

I have been taking Yasmin for about a year and a half. I started taking it after my second child was born. I seem to be emotionally good for the first three weeks in the pack. However, during the forth week, the week with the different colored pill, I am an emotional basket case. I get angry at everything and am just miserable to live with. My husband has stated once or twice during the past year and a half that he thought I was too emotional during that time. I blew him off! However, lately I have been realizing that he may be right. Also, I have been spending more time outside with the return of summer and have noticed that my face has gotten much darker in patches. Are these two symptoms a result of the Yasmin and if so what can I do. Do I just need to go see my OB/GYN and see if he can help