It's such an emotional time, all those thoughts run through your head and you can't help but worry. For what it's worth I was convinced my 12 week scan would show something awful. So convinced I told DH "well this it, when we come back home we'll no longer be parents" and more! I was even doing pregnancy tests that morning lol. So I completely understand how you feel!
I'm certain that your bubs is just fine. Being away from home and your DH wouldn't be helping either.