High worry/anxiety about your first?

Denise
I'm 18 weeks pregnant with my second child, and recently I've been VERY worried about my first. I'm isially a very layed back parent with her as far as worrying that she will get hurt/lost/etc, but lately I am constantly VERY worried that something terrible is going to happen to her. I know  being irrational, but it doesn't help the worrying. Anyone else?