Mirena Time Parenthood, Mirena Coil, Constant Tiredness, Crazy Bitch, Mood Swing

I'm really in need of some serious help, I really don't know where else to turn. My wife had the Mirena coil inserted shortly after our baby in late 2007. For a while, it seemed like a dream. Short periods, easy birth control, no fuss. About 6 months later, my wife completely changed. She lost a lot of passion for life in general and in my specifically. I blamed it on the stress of first time parenthood, I was an uninvolved father sometimes and wasn't pulling my weight...that I understood. Ever since, I've been working tirelessly to make it up to her. I've become a stellar Dad and spend most of my free time doing chores and working in the yard. It hasn't helped, in fact the more I try the worse things seem to get. Her mood swings are starting to border on frightening...in the past 2 years she's hit me several times and threatens it constantly. She told me she hates me and wishes I was dead. The craziness is coming fairly regularly now...at least one week a month and sometimes for months at a time. The other side effects I can deal with...the constant tiredness, the acne, the weight gain, etc. I just wish I was married to someone who could be happy sometimes. It finally dawned on me a few months ago that the Mirena may be our culprit. I read for hours and hours about everyone's experiences and problems and it sounded exactly like it. Unfortunately...I've tried to discuss it with her, and it immediately throws her into a mood swing (or makes worse the one she's currently in). I've tried to be resonable and just talk, and I've screamed it in her face one time (I really don't recommend doing that). Where do I go? It seems that this little plastic piece of evil has so stolen her rationality that she refuses to even consider that it's a problem. She is convinced that I am causing all of her problems in life. She even once agreed to have it removed, but then never did and every time I remind her to make a appointment I get the crazy bitch back. Please help me! How do I approach this? I care deeply about her and my family or else I wouldn't be living here (in the basement no less) and trying to work through this. I really want to just pack up and move out, but I can't abandon my family like that. Please some helpful words...I'm starting to become concerned for my own safety and that of my child.