This happened to me as well.... From my calculations, which should have been pretty good considering I was temping and charting....I should have been over 6 weeks. Had some bleeding, went to the ER, got an ultrasound and the tech said, "There is no way you are 6 weeks" There was nothing visible on the ultrasound at all except really thick lining. My HCG came back at 1200. I went to my OB a day or so later, and he saw the yolk sac and fetal pole. Anyway, my DD is now almost 6, so it did work out. I still think my calculations were correct, as she was born 4 weeks early and was 8 lbs, 1 oz and very healthy, I think they just develop at different paces in the beginning...
Helen is 5 and just started Kindergarten!