"i have been on mirena for 3 months now and it is amazing. i am 23 years old and have not had a child so the insertion was pretty painful. i had a lot of cramping after but nothing that some aleve couldn&#039;t handle. since then my periods have gotten significantly lighter. i have not experienced any difference with my weight (but i am hoping it will make me lose some). i have been on the pill and then the ring. mirena is the best birth control i have experienced yet."