I don't think there's anything wrong with avoiding if you're that mentally tired. I get it as well. I think what you can consider are all the interactions -- you can probably do some of them via text or e-mail or through another person to give yourself a break. Maybe think of how much is too much and strike the right kind of balance between using technology vs. engaging and stuttering. Then of course slowly ween yourself off the tech, of course ... http://helloistutter.com/2014/09/29/summing-up-a-day-of-stuttering/