Pregnant. Done Ultrasound, Fetal Pole And Sac Detected, No Heart Beat. Is That Normal?

Hello,

My wife, she just found out that she is pregnant. LMP 5 Aug. So she is approx 4-5 weeks right now. She works in xray so the radiologist had done her ultrasound (transabdominally only) and he says that there is a sac and a small, what appears to be a fetal pole. No heartbeat detected. This was late last week.

Yesterday, she had a cooworker who is a qualified sonographer check on the pregnancy's progress. She did an endovaginal scan and told my wife that she did even see a sac? What do you make of this? She has an appointment to see her doctor on 18 Sept, but we are really scared/nervous.

Anxious and worried. We haven't had our first child yet.