Anyone else experience anxiety after they get home from work?

I like my job, and being there isn't all that stressful (it has it's moments), but I am generally pretty cool about being there. Without fail though, about a half hour after I get home, I am hit with a huge wave of anxiety, stemming from, for lack of better words, freaking out about the "rat race", the toll it takes on me, the pressure to live up to what is expected of me, etc, etc...

What IS this, and how do I make it go away?