No baby on Ultrasound help

Destiny • Im a 33 year old mom to 2 beautiful kids 16 year old boy & 14 year old girl.....so excited to be expexting another lil blessing with the love of my life!
Had my first ultrasound at 7 wks 6 days due to miscarriage in October this is our rainbow baby, bit only seen yolk sac no baby 😕 docs had me take blood test for levels and they are right where they should be wants me to take them again in 2days to make sure they are going up like they should be. Anyone else have this happen and baby turn out ok and be seen on next ultra sound?? Please help with any advice TIA