Hi, my last period start date was the 4th September 2013. all the pregnancy tests I've done are positive, when i went to the doctor on the 21 October 2013, they told me they see a sac only but there's nothing inside maybe the development is delayed. I went again on the 4th November 2013, doctor said theres nothing in the sac but im definitely pregnant. measured the sac or something said its 2.1cm, took blood tests and the HCG was 4327(hope I'm correct or i missed a digit) I went back again on the 6 November 2013 and there is no fetus just a sac. measured the sac or something said its 2.4cm doctor said she see's a collapsing sac, and took blood tests again to see if HCG increased will only received the results in 48 hours. but the doctor said she is suspecting Blighted Ovum or ectopic pregnancy. I dont know whats going on did I have a missed miscarriage?