I felt the same as all you ladies. It's sad when the innocence is gone. I only had one innocent pregnancy though, my first. After that I got exposed to things that can happen via people I knew and then the darn internet.
once you get past the scans it seems to become is the baby moving enough? Well it has been for me with the anterior placenta.
I can't say it goes away after the baby is born either. I would look to see if my last guy was still breathing so many times. And he was my fifth child! I think I was neurotic for the first 6 months with him for no reason.