Just one of those days

Do you ever have one of those days when you think you just can't do it one more time? Everything at work is irritating me. I am extremely thankful to have a job, but I just can't put up with all the BS that goes around one more day. I'm working from home today, but I desperately need a vacation. Could also have something to do with the fact that I'm on day 3 of South Beach and I am missing my fruit and wine and chocolate and bread....this detox is none too pleasant for me or those around me.