Hello and welcome,Mirena
is a very effective contraceptive
as it acts as an intra uterine device as well as helps change the uterine lining making it inconducive for the baby.
The symptoms are most likely due to the mirena. The stringy discharge may also be due to the device.
However if you have any doubts get a pregnancy
test done to rule it out.
Please do not worry. Pregnancy is very rare after mirena.
Hope this satisfies your query.
Thanks for using HCM.
Feel free to ask any more questions that you may have.
Dr Madhuri Bagde
Consultant Obstetrician and Gynecologist