Hi there!
Last summer I had a pregnancy just like the one you describe..everything was just like a normal pregnancy but when it was time for the ultrasound no baby no sack..it was horrible due to the fact we tried to get pregnant for 1 year.now I'm pregnant and due Sept..will be praying for you :-)
False positive pregnancy test are caused by:
Fertility treatment: if u receive shots of hcg..
Chemical Pregnancy: when the fetus does not develope..
Certain rare medical conditions such as Trophoblastic Disease, Islet-Cell Tumors, Heterophile Antibodies..
Medication Drugs like Methadone, promethazine.
Phantom-HcG..
Hope its not one of the above. Wish you the best. With a vaginal ultrasound your able to see a sac atlist by 5 weeks.
Its possible that it was a blighted ovum, meaning your body absorbed the embryo. But you would still get a positive pregnancy test and hcg levels will still increase for a little while and eventually start to decrease. Or maybe the dates are off?