Hello, and I hope I can answer your question.
coil normally produces irregular bleeding in the first few months of use, so those symptoms are completely normal. However your fatigue
, weight gain and feeling sick make me concerned that your IUD may not be working properly (you never went back for the re-examination) and that you may have gotten pregnant. The device can fall out occasionally, especially in women who have given birth recently.
I suggest you do a pregnancy
test right away. If the test is positive, you should see a doctor immediately, as there is a risk of a tubal or ectopic pregnancy if you get pregnant with an IUD. An ectopic pregnancy is an emergency and can even result in death without proper treatment.
If you are not pregnant, I would still advise you to see a health care provider to check that the Mirena is working properly and evaluate your other symptoms.
I hope this advice was helpful, and that you feel better.
Sincerely, Dr. Brown