Hello. I was fitted with a Mirena coil 3 months ago. The first three periods were lighter but I am now on my fourth, which isn't. The first 3 days were light but I have now had 2 days of extremely heavy bleeding and huge clots. The information leaflet and verbal advice I received both stress that it can take up to 6 months for the Mirena to be effective. However I am wondering, given the initial improvement, whether what I am now experiencing is simply part of the 'bedding in' process or whether this is an indication that Mirena is not going to be the solution for me. Any advice would be gratefully received.