Hi everyone, New to the forum and hoping you might be able to help me. Went to the DR today for my first visit. LMP was Oct 3 and I'm quite regular, not tracking ovulation, but can usually tell within a day or two of when it is. Thought things would be on track to be 6.5 weeks b/c period/ovulation seemed on track, plus I did a pg test the day AF was due that was positive. But DR did quick u/s today and said I'm measuring around 5.5 weeks. Baby was too small to see or get a hb. Which date do I go by? And should I be worried about not hearing the hb? Is it possible to conceive and have a positive pg test (and the start of some symptoms) one week later? Thanks all!