I have had my iud for about 4 years and about 1 month ago I started having symptoms of pregnancy. Like I have been nauseous and vomitting, sore nipples, tired all the time, irritable and mood swings, eating and urinating more frequent, cramping in my abdomen, my stomach is bigger and getting hard like it did with my first pregnancy and lower back pains. I have taken two home pregnancy test and both negative. I was just woundering if an iud could cause a false negative and if not what would be causeing the pregnancy symptoms?