Question

Has anyone had there doctor tell them that they were going to miscarriage but didn't? Hcg started at 29 and now they are 4300...had slight spotting tonight (which happened with my first daughter) but I went to the ER and I they did blood work and did a vaginal ultrasound (which I didn't even know they were supposed to do) he told me that the baby wasn't measuring the correct size that it's supposed to at 5 weeks (which I didn't even think you could see anything at 5 weeks) and that my hcg levels were low! I thought 4300 was great at 5 weeks. He told me that there was a 95% chance that I would miscarriage and basically said if I didn't then pretty much there would be something wrong with my baby!!! How Would you know when I'm only 5 weeks!