I had my 3rd mirena coil fitted just before xmas 2008. Had the first one taken out because we were tryin for a baby, circumctances changed and had it put back in. 6 mnths later it got infected and it had to be removed. after a course of antibiotics and 4 peiods i had it fitted again dec 2008. since then i have been bleeding, not heavily but enough to be on the pad, sometimes dark in colour sometimes light, sometimes heavy sometimes hardly anything. what s the problem???