Measuring late

Donna • Mummy of 2 in Australia, pregnant with number 3
I found out I was pregnant April 8
But my ultrasounds have been all off.
I'm only now measuring being due January 2nd, but will have a csection last week December.
There is a yolk sac, embryo and no heartbeat Monday may 2nd the CRL was 3.1 roughly, But we had growth from 3.4mm Saturday to 4.8 on Tuesday.
I go back on the 17th to confirm viability.
Is there hope :(