It's supposed to be scary? That sheds a totally different light on your OP.
Once, I worked in a building that had all the sounds of a mausoleum. I worked Janitorial there, and it was an ancient office building by Portland's standards. It was called East Hall, and it was on the campus of Portland State University. I was terrified to have to work in that building, because it was so darned quiet.
Anyway, a guy walked up behind me and tapped me on the shoulder. I jumped, almost out of my skin, and shrieked in terror. I thought nobody was in the building except me, so when the gentleman, who happened to be working late, tapped me on the shoulder, I howled at the top of my lungs, and found myself shaking violently for the next several minutes.
Maybe something like that would do your line some good. Maybe something like:
"G-d!" she howled (or screamed, perhaps). "I'm too paranoid."'
Maybe you could re-invent your sentence to put something else in that works better, like:
'She jumped at the sound of the doorbell. "G-d!" she whispered, trembling. "I'm too paranoid!"
Of course, this is only one other writer's suggestion. Whatever you decide, I'm sure it will be exactly what works best for you. Good luck to you!