Hi Harman,
Remeber me from one of the other Mirena threads you're on? I'm still watching with interest as I have exactly the same questions as you. My AF doesn't sound nearly as bad as yours, but it's still enough to make me think about my GP's suggestion of trying Mirena.
Like you, I'm trying to balance out the positive and negative experiences. The 'official' Mirena website quotes about 88% success rate, with the rest of women having differing degrees of side effects.
I was on the mini pill for several years with no problems so hoping I wouldn't be sensitive to the hormone.
My main problem is that I'm such a wuss and am really squeamish about having one fitted. My GP showed me a real one, and thought it was quite funny that I wanted to leave there and then, but I really didn't want to see what might be going up there! What a baby (and, yes, I've given birth naturally twice!)!!
How are you getting on?
BL