No HB 6 weeks 4 days

Carla • 43 years old, 1 late loss + 4 Mc = 5 years of sadness. Miracle baby May 5, 2018 ❤️
Hi there, I've had 3 prev. Losses and am pregnant. Had an ultrasound yesterday and my dr said it's the right size but no heartbeat detected yet. Scheduled another in a week. 
I'm miserable, but my dr. wasn't worried at all and said this is typical for this time. 
Due to my past history, I am nothing but worried. Any ideas or some happy stories out there to cheer me up?