Ok, so my Dr sent me for a stat ultrasound. the tech said its way too early to know anything right…

Ok, so my Dr sent me for a stat ultrasound. the tech said its way too early to know anything right now, not even a heartbeat. I guess I'm not even the 6 weeks that the Dr said. they said they saw thickening of the uterus, which means pregnancy and just the beginning of the yolk sac forming. Some research told me that means I'm 4 weeks or so. Waiting to hear back from the Dr on what she wants me to do now.