I am measured out 7wks and 3 days pregnant. I went to my dr last week and the thought he heard the baby's heartbeat at 88 and told me that was low mind you I was 6wk and 2 days then. Is it possible he heard my heartbeat instead of the baby's. I went back yesterday and he said no heartbeat. I'm not having any symptoms and the baby was much bigger. It was a vaginal ultrasound. Was that maybe my heartbeat??