You won't fall behind by taking a year or even more off.
You can accomplish what the schools do (or more) in only an hour or two a day.
You don't have to follow a curriculum to get a good education.
If you are stressed out or your kids are stressed out, you are doing it wrong - take a break, reassess and start over.
It takes awhile
to deschool
Don't expect "school at home" to work for a child who didn't do well doing school at school!