14 week scare - need prayers

Yesterday I went in for a checkup. I'm 14 weeks along and the OB had a hard time finding the baby's heartbeat using the Doppler. She rushed to get the ultrasound machine and successfully found the heartbeat. But the (mental) damage was done and I've been crying since.  Last year I lost my daughter during labor at 39w and I'm terrified it's going to happen again. Any prayers and words of encouragement are greatly needed.