I'm home sick today

[That is, I'm not at work because I'm sick; I'm not homesick. That wouldn't make sense because I'm at home.]

I went into work (late) this morning and then left at 11:40 to go home and eat lunch. On my way home I decided I was sick enough to not go back. I have a cold. But if I liked my job I'd be well enough to be at work. I'm tired/sorta sick, but am I napping? Of course not...why would I want to spend my day off from work asleep?