I'm always in doubt stages about something or other. *cough*

But I think at least you can trim things down if you add to much, right? Healthy doubt seems normal.

Just until it becomes a possessive, tentacled pseudo-shoggoth from the depths of space here to suck out your brain and see you never get the novel done. ;)

Hopefully you can find a good balance with finding the balance of fleshing out details without compromising your idea of how the novel should be. :)