"as you see i gave the effectiveness a 10 (i didn&#039;t get pregnant anytime)! i had regular periods (4-5 days and no irregular bleeding) and no mood swings, however i did always feel a lot hungrier but i didn&#039;t gain any weight and i would experience very frequent terrible headaches. other than that i would recommend this pill plus everyone is different so just because i had headaches don&#039;t mean you will."