Managing the Malaise

I read it very well might happen, but I didn't think it would happen to me: the post-race blues. Since I never suffered through postpartum depression after my two kids were born, I didn't think this would affect me--but it has.
So despite my personal triumph in the Syracuse Half-Ironman, that high has not translated.
Some mornings I sleep until 6:30, even though the alarm is set for 4:30. Some mornings, I run 3 miles instead of 7. Some mornings, I just don't want to get on my bike, so I don't. I've had a flat tire for about a week, and I just don't feel in any rush to get it fixed (though I'm buying a new tube today).
The pool? While the thought of gliding through the warm water comforts me, I just don't feel like hassling with leaving work, changing, swimming, showering, changing and going back to work. Seems like too much trouble these days.
Now part of the issue could be this nagging right-foot pain I've suffered with for about six months. Some days it's better than others, Aleve helps, and it doesn't hinder my running; it just makes it less enjoyable than usual. I am seeing a podiatrist next Friday, and hope for some definitive answers, and a solution to the problem. I'd even consider surgery; at least then the issue won't keep popping up.
I signed up to race a 5-miler in Eastwood on Sunday; somehow I'm still able to run fairly quickly, though my speed isn't what it used to be. Training more for endurance, plus the foot pain, kept me away from the track all season.
So, I'll keep pushing through this haze, planning my workouts, likely upping my weight work to three times a week since biking falls off when the weather worsens, and think about running a half-marathon in April. If I need foot surgery, that would give me plenty of time to heal and recover and train. Either way, having a goal should help dispel the malaise that has descended. I can only hope.