I'm roughly 7-8weeks shown by blood test. My 1st ultrasound at 3-4weeks showed nothing and they told me to get a second ultrasound on 7weeks. I started period pains shortly after started bleeding I went to the hospital they did ultrasound found the sac but it was very low In the cervix, but no sign of embreo yolk or heartbeat they did a hormone test they were greater then last time but seems for a 4week baby very confused please help