Hi, I have an IUD, and I have been having all the signs of pregnancy for nearly 2 weeks:  cramps, bloating, very sore breasts (and they are bigger), low back pain, constipation, heavier vaginal discharge, some dizziness.  My period is supposed to start today or tomorrow but it's not here yet.  I have taken 4 pregnancy tests and they were all negative.  I have a dr appointment tomorrow but I am going crazy waiting!  Has anyone else experienced this?  Has anyone gotten pregnant while using an IUD?  Or could this be ovarian cysts?