True Patriot
Sanity is subjective
You're doing fine. They're lucky to have such a caring person. One thing I noticed in your original post. You don't need to add grit to their food. You can just place it in it's own dish in with them. They'll eat it when they need and you won't go through as much.
and especially if they have recently brooded. In my experience each subsequent brooding in close proximity gets more sloppy so I don't allow it in my excessive gals that wanna sit on every third egg.