I’ve had the copper IUD for just over a year now my sxpierence has been good I would say periods on time every month and the flow was reasonably a lot. The past 2/3 months on the day my period starts I have been spotting very light pink for 2 days then nothing then will have a light period for another two days then finished. I know the copper coil is supposed to make it heavy and they all used to be reasonably heavy now basically nothing! What could this be? Any advice?!