I received an ultrasound at about 3 wks. There was no gestational sac, the doctor said it was 1 of the options I was real early, it could either be a tubal pregnancy or a miscarriage..and rescheduled me for a 6 week ultrasound! I'm nervous, I'm still waiting to atleast see some signs of pregnancy..two weeks later and still no bleeding, no signs off a miscarriage..should I be concerned?? Im hoping I was just too early.