Mirena side effects, PLEASE help?

Hi everyone,

I am new to this site, and found it during my research of Mirena side effects. I had my Mirena inserted June 2008. It was an easy placement, I had no trouble with it until a month ago. After placement my period was normal, 28-days cycle; 5-6 days. Last month my period all of a sudden was very light, and only lasted 4 days. Then this month, I have had no period at all. Other things I have noticed are the following:

- weight gain of 10 lbs
- breast soreness and tenderness
- lactating recently
- cramping
- horrible mood swings and anxiety attacks
- insomnia
- lack of sex drive

Basically I am feeling like I am pregnant. Is this normal? I made a HUGE mistake of trusting my GYN when he suggested Mirena and I made an even bigger mistake when I didn't do proper research about it prior to insertion. Can someone please help me shed some light as to what I am feeling and if they are normal side effects?

Thank you.