I am on the first trimester of pregnancy.and ultrasound report says there is no yolk sac and no heartbeat

Hello….
I am 30year.
I have 8week 5days pregnancy.
I got ultrasound report yesterday. In which they says that I have no yolk sac and no heartbeat. But fetal pole is present… Crl is .41
I am worried.. please help me to say that is it normal? I don’t have bleeding. I referred to next sonography after two weeks. Is it possible that next time they can see yolk sac and heartbeat. If they find same situation in next ultrasound then what? Is this a miscarriage sign for me. I had two miscarriage before this pregnancy. I have a daughter who is 5year old. Please help me by your reply….