I just had my first ultrasound yesterday at 8 weeks. The ultrasound tech said that baby is only measuring at 7 weeks and 1 day and asked if I was sure of my last period. Yes, I was sure. This baby was planned. Heartbeat was 139 and they said that was good. I have another ultrasound supposed to be in 2 weeks to see how baby is growing, but it's set for 3 weeks bc doctor won't be in. Should I be worried? They said everything looked okay but I'm still a worry wart because of my last miscarriage at 6 weeks.