It is possible for menstrual cycles to become totally absent while on Mirena
after tapering down. Conception rate is 80% in the first year after removal of the coil. Efficacy of the IUD remains for about 5 years. I suggest that you have a gynecological examination and an ultrasound
to exclude any pregnancy
. HPTs are not always positive with low levels of hormone as they are not sensitive, blood tests for pregnancy are better. Please consult your doctor for further advice. Take care.