Stressed

Christine
I went in for my first appt today. By my period date I should about 12 weeks but I honestly think Im about 10 weeks along. The dr couldn't find a heartbeat with the doppler. So now I have to wait to get an ultrasound with a specialist due to the fact my last baby was a stillborn with a birth defect. I am freaking out and so stressed. How do you try to be optimistic through this?