8w4d - Couldn't find heartbeat

Went in for my ultrasound today and saw the baby. They said it was measuring 8 weeks but no heartbeat. They took blood to test my progesterone and are having me come back in in 2 days to do another sonogram and blood test to see if my levels go up or down. They said I may miscarry in the next few days but I'm still praying and hoping the baby's just shy. Please say prayers for me. I'm devastated but staying faithful.