Momentumista Hello, I really feel for you. I have just dipped in here, so I haven't read any of the other advice, I can only offer my own perspective.
I have a Mirena Coil, and my experience with it so far has been an absolute rollercoaster. All is fine now, 7 months down the line.
BUT since May this year, when I had it fitted, It has been a Hormonal Firestorm. I struggled to get out of bed every single day for the first four months (I am a very active and self-motivated person). I fell in to the blackest despair pit I have ever known (was bit prone to short bursts of PMS related depression on a monthly cycle basis), and genuinely felt absolutely suicidal (emphasis on felt here, would never contemplate suicide, I have children I love dearly).
During this time, I sat sobbing on the bathroom floor many times contemplating yanking the bloody thing out myself, when I wasn't scaring myself half stupid with all the online information I 'Googled', about the horrendous reactions some people have to it.
I now feel like I did in the Middle Trimester of my pregnancy. Very calm, hair glossy, my horrendous flooding periods have completely stopped, and I have lost the stone I immediately put on the minute I had the monster fitted. So, in short, hated it but stuck with it. My boobs have gone up a Bra size and hurt all the time.
It's definitely not for everyone, and anyone who forces you to stick with something alien in your body, that is messing up your physical and mental health, has not got your best interests at heart.
AND, Big Pharma definitely put profits before patients. We all know that these days ; x