"i got an iud because i have migraines and am unable to take estrogen. i personally believe that this is by far the best type of birth control out there because you don&#039;t have to think about it at all and can do anything with it. i am 20, 5ft 105lbs and i believed the insertion was very hard and painful. the measurement is the worst part and the insertion feels like a bad cramp but doesn&#039;t last long. what&#039;s hard is the very intense cramps i consistently got for 7 weeks along with the constant spotting. the only issues i have with it is my periods are now longer and lighter, almost spotty and this is very annoying. i get very bad cramps from it to the point where i wake up in the middle of the night."