I had my mirena (levonorgestrel) iud since sept. i've been getting my periods every month but my last period was 15 days. now 5 days later there's all bright red blood?

The most common side effect of Mirena (levonorgestrel) is light or absent menstrual periods.: Because the secreted hormone Progesterone stays local in the uterus and does not circulate throughout the body systemic side effects are rare. Patients sometimes report acne, weight gain, pain ovarian cysts vaginal discharge and other symptoms which may or may not be related to an iud.