Its your IUD
The gynecologist says: Hormonal IUDs, like Mirena, Jaydess, or the newest product in Canada called Kyleena (a low-dose hormonal IUD that can be used for five years) control bleeding in part by thinning the lining of the uterus. Progestins keep the lining of the uterus from growing out of control but it can do too good a job, so the lining is a bit unstable and sheds. This can translate to a period that is so light it is perceived as spotting. Tracking your cycle will help. For some women, particularly those who have heavy flow prior to an IUD, they will experience irregular spotting instead of the heavy period, or spotting with lighter flow. Women should weigh the pros and cons of spotting against what periods were like before especially if they were heavy or painful.(Related: 10 Doctor-Recommended Ways to Make Getting an IUD Less Painful)
