I’m 48 and had a new mirena inserted back in November. This was to stop very heavy periods and because I wanted to start HRT. I bled for few days after insertion and then nothing g which was fantastic! Had red blood last week for a day or so and cramps and today had more spotting g. I’m worried as had nothing for months. Why would I bleed after 6 months if nothing. Had nothing with my last mirena for 5 years! Help please