Terrified of my next apt bc of this app😞

Shane
I had my 8w us that went great and my next is in about two weeks when I'll be 12w and 3d; and I'm just so terrified of them saying the baby stopped growing or not finding heartbeat. Staying positive but after reading on here what has happened to some ladies I can't help but to worry! 
Anyone else sharing this concern too 😳😬😦