Pregnancy with IUD?

Ashley

I’ve had the ParaGard (copper IUD) for 2 years now and never had any issues. This week my boobs have been very sore and today I missed my period. How likely is pregnancy with an IUD? I mostly read about ectopic pregnancies. I took this test midday, so not FMU.... but it seems negative. Right? Anyone ever had this issue or gotten pregnant on an IUD?