"i started this birth control on the 1st day of my period exactly 2 weeks ago. i started to notice some extreme headaches within the first week that would not go away no matter what i did. i wasn&#039;t absolutely sure it was the pill that caused it, i thought maybe it was from oversleeping. however here i am two weeks later bleeding, and having unbearable cramps whereas before i would bleed for 5 days with minor cramps. i just stopped taking it 2 days ago so i&#039;m hoping the side affects go away soon. i know birth control affects everyone differently i just couldn&#039;t deal with the headaches. hoping the nexaplanon side affects aren&#039;t too bad."