Guilt

On Monday I stayed home and didn't do any work.
On Tuesday I stayed home and worked.
On Wednesday I went back in to work.
On Thursday I went back in to work.
It's Friday and I'm working from home again but not because I'm sick. Because Atlanta is one sheet of black ice.
But I feel guilty. Even though my boss wrote us and told us to use our best judgement about coming in and working from home if we couldn't. Even though I'm working from home and am more productive without all the distractions and disruptions. I still feel guilty. Why?
I work too much as it is. There are people in my office who don't work enough. Yet I'm sitting here feeling guilty. Not right.