6w3d scan help!

Amanda
I went to the er for severe pains. The ultrasound tech did one that took over 30 minutes. The doctor came in and i asked about my baby. He said the tech saw 2 sacs. Babies measure at 6w3d, but no heartbeats. He said that's normal this early on... I'm freaking out because i just had a miscarriage in February. I'm not having any signs of a miscarriage, but I'm worried. Anyone else have an ultrasound around that gestation, no heartbeat, and everything turn out ok?