Earlier quoted context omitted.
I'm married with two children and I can assure you that not only has my mental state slipped because of the stresses of home life, but I also lost an enormous amount of social activity that I intentionally maintained in order to keep my brain and health at optimal levels. I am OK, but my productivity is toast.
Not trying to one-up you here as having a family brings different forms of stress I can't speak to, but it's really hard to go for a week without interacting with another human being. Social connection is core to who we are as humans; cutting that off is like removing a limb.
It may be worth keeping in mind that this, too, will pass.