Slow rising hcg and low progesterone

Hello ladies, I

am 5 weeks 4 days pregnant. Yesterday i had an ultrasound which showed yolk sac . No heartbeat.

My hcg levels for last 3 bloodwork at 48 hrs interval ade 5534, 8605 and 11000s. Doctor confirmed its not ectopic pregnancy.

I am scared that it might end up as miscarriage.

Anyone has similar experience and had normal pregnancy?