you are missing the most important thing that is the pregnancy test is an error which means it is not positive. of course if iud (intrauterine device) is displaced from the normal position there is a chance of pregnancy and also of tubal ectopic pregnancy. but it is not that all cases have a tubal pregnancy. only after around 14 to 20 days of missed periods you can see the baby's heartbeat on the scan. there is no matter how good the scan is. the thing which you saw could be your heartbeat and it can be mistaken. the red and blue color is doppler scan which just shows the flow of blood to and fro. the most confirmatory test would be serum beta hcg (human chorionic gonadotropin) and this can diagnose a pregnancy no matter how small it is. only when the value goes above 1500 iu/ml the baby's sac can be seen on the scan not before. so you can decide when to scan. the discharge can be the fluid from uterus cavity or cervical canal when the iud came out. fallopian tube swelling on the scan is not very conclusive. for further information consult an obstetrician and obstetrician online --> <link>
my iud got displaced and i am late for my periods. does it mean ectopic pregnancy?