"i&#039;m 21 and i&#039;ve started taking trinessa on march 20th and its been working great! no pregnancy scare which i love! one big flaw it did have on me was when i got my period on the first of april which i had it for 2 whole weeks! the first week was super duper heavy and i&#039;ve never gotten it like this before. this is the first birth control i taken so after 3 kids trinessa is working. my body is just getting use to this birth control i guess."