Hi, mommy! Hope you're well na. Fever after giving birth may need medical attention, sana ok ka lang. Minsan matagal talaga bleeding postpartum, this isn't because of the IUD, it's your uterine lining shedding kasi lumabas na si baby.
Good evening. It may due to a lot of things (mastitis, IUD infection, UTI, etc.) It is best to consult with your OB-gyne or your doctor of choice.