Lucky! I tried the Mirena for my ridiculously heavy peri-menopausal periods. I feel within the 20% or so for whom periods don't stop. Mine kept going heavy and frequent but I did get the weight gain and emotional side effects!
I would suggest that the person who posted this try it, especially since her age and family planning status wasn't mentioned and it is fully reversible.
Also, do get an appointment for an ultrasound if you can, a lot of times this can be related to fibroids or other uterine problems.