I had Mirena put in on Aug 15th 08. To start with I hated it. I bled for a month straight and I was tired all the time. Now things are getting better. I have not had a regular period since having it put in. I bleed a little after sex but other than that no symptoms. I don't have much of a sex drive but I didn't before I had Mirena either so I don't think that is a side effect. As for any cramping or mood swings I don't have any of those either. Now I am extremely tired and sometimes moody but I am also the mother of a one year old so I feel that explains that. If anyone's symptoms go on for longer than a few months then I would suggest having it taken out as this may not be for everyone.