Can you drop the class or some of the work in it so you get a "B" instead of an "A", etc.? I had to drop out of my classes for the last Fall semester and it was really a great relief at that time for me. I would miss Monday's class and just take some time for yourself and/or your kids (or go elsewhere to think and relax for half the class and come home "early" so you see the kids).

Skipping one class might not solve the whole problem but it can relieve some of the immediate pressure? I would seriously look at dropping out of a class or all of them this semester and spending that time working on my living situation and getting it in better shape so I won't have as much pressure when I return to school.