from the mirena info you got when you agreed to have it inserted. rather disingenuous as the risk of getting pregnant is higher in women who don't use fucking contraception. i know of women who have tortured themselves over this. thing is, if you use any contraception there is always a chance it will fail and you will get pg, right? but what you don't want is to threaten your life and future fertility in the process...
"What about side effects?
Taking any medicine carries some risk of side effects. With Mirena these are most common during the first months after the
system is fitted and decrease as time goes on. Apart from menstrual changes, possible side effects might include headache (also
rarely migraine), lower abdominal or back pain, acne, rashes, itching or skin problems, tender, lumpy breasts, increased discharge
from the vagina, vagina itching or pain on passing urine, depression or other mood changes, a feeling of sickness, bloating, or
swelling of your legs and ankles. Ovarian cysts and pelvic inflammatory disease have been reported so tell your doctor if you
have lower abdominal pain or if you experience painful or difficult sex. Other side effects such as weight gain, hair loss, or
greasy hair have rarely been reported.
Ectopic pregnancy (development of fertilised egg outside the uterus) is possible with Mirena but highly unlikely. The risk of this
happening is lower than for women using no contraception.
You should tell your doctor if you have lower abdominal (tummy) pain especially if you also have a fever or have missed a period
or have unexpected bleeding. This might be a sign of ectopic pregnancy. If you think you are reacting badly to Mirena or are
having any other problems, please tell your doctor or clinic."