So according to my last mentrusal period. I am suppose to be 12weeks and 5 days today! I had a ultrasound today at a pregnancy clinic. (I havent seen my dr) and as im about to see my baby... there is no baby but just a empty sac... according to the sac... im measuring at 6weeks 1 day.. i called my drs office and they got me in tomorrow. Im trying yo stay positive but its a 50 / 50 chance it can be a early pregnancy or miscarriage. Ive NEVER been wrong on my dates till now . HAS anyone else had this happen ?...