Graphite,
As I mentioned before, an-hedonia and apathy are common symptoms of grieving. Do not worry that this is a crisis of faith or a permanent state. However ill-timed it is, you're human and far from alone in your reaction.
If it's of any comfort, as you get older you get a lot of grieving done for pets, loved ones, catastrophes and disappointments, traumatic experiences and so forth. It's rotten and awful but you do gain experience and learn to cope more efficiently. 'Least that's what I've found. Anyway, the grief is real.
Necro, wrath is my coping mechanism too, and it can be a dangerous one. Wear a "leash," and allow others to pull it. Hope that metaphor made sense.