Mh periods were heavy.
Tried mini pull but they just got heavier linger and then continuous. 
On my second mirena as first came out. I bled heavily - think jelly pot sizes clots continuously for 4 hours.
Had northisterone for 3 months and second mirena fitted 2.5 months ago.
Had random spotting and light period and now have another heavy period.
They've been following an odd pattern for a year. Light bleed. Stops for 12-16 hours and then heavy bleed. Stops for another 12-16 hours and heavy again. Then may have light bleeding for another 10 days.
The pain is usually day 2 before second heavy bleed. This month it was so bad mefanamic acid, panadol and wheat bag on tummy and back didn't make pain subside enough I could sleep.
I know I have to give it 3-6 months to settle and up to a year.
But has anyone had experience of it not working at all?
Cannot face another summer of going out in heat for 2-3 weeks a month in constant pads or even tampon, pad and period pants.