Are you coming down w/ a virus? I've seen it too many times were someone thought they were having a emotional or mental day, when it turns out they were getting sick-and that includes my kids. Guess the brain might
have more than one way to get you to lay your butt down and rest.
I understand your 'go hide' feeling, escpecially at the age your at (I'm 44),
but I'll tell you something-it will just get worse and worse the more you give in to it. Same way, you could 'train yourself' into something that feels great:
Take a refreshing shower and go outside for a walk instead. Life is short, and there are beautiful views and people (maybe) who would benefit from
the briefest smile from you, and even a polite 'hello'.
If you feel like you are going to fall asleep on a dime when you get back home...it's a virus working on you.