I had a ultrasound done at 5w1d and all they could see was the beginning of a gestational sac but I had my hcg levels done the same day and they were 8,000 and 48 hours later they were 14,800... should I be worried that they didn't see more since my levels were so high? And also my levels didn't exactly double after 48 hours so is that cause for concern? My dr doesn't seem to be worried at all but I am a worrier by nature :/