"I have had Mirena for 1 yr and 4 months. I&#039;m 20yrs old and have a 2yr old daughter. While on Mirena I&#039;m mostly moody and pissed off and every other day I get headache and gained 20lbs. I workout everyday, watch what eat and I still can&#039;t get the 20lbs off. I will go and see my doctor on Tuesday to get it removed. But everyone is different. Good luck everyone!"