I had the mirena coil fitted 3 years ago after my 3rd child. Have had no periods or side effects...all great. Yesterday I was awoken early in the morning by sharp intermittent twinges top left of my rib cage. That eased off and I have had a cluster migrant today, then my lower left back/hip is aching. Now it has spread around to the front and I've realised that the dull dragging aches back tummy and leg feeling is what I used to get when I was due on. Rsearching my side twinges yesterday someone mentioned they get them when they're due on. So it all kind of points towards period pain from hell...but why now after 3 years of nothing?