Scared about 12 week scan after previous mc.

I had a mc in september. Im now 12+1 and have my dating scan on thursday.

I am absolutely petrified that

A) there wont be a baby

B) the baby will have stopped growing at 8 or 9 weeks

C) there will be a baby but no heartbeat.

Can somebody please provide a positive story? I am terrified and anxious and as a result i cant focus at my job :(