All of that coughing and waking up in the middle of the night. Turns out it wasn't the smog from Phoenix...three weeks later. So, I went to the doc and got antibiotics for bronchitis...almost done with it.
All of the info online I could find said: Do not train if there is any illness below the neck...so, I laid off last week.
Back on schedule this week. 5 miles today.
I suspect my black mood a week or so ago had something to do with being physically ill, too.