I think we numb ourselves to ease our own pain, its a survival technique, a new threshold to pain. but since we cant do it only on specific aspects of our lives, it tends to numb everything around it too. so when we have a loss like you did, its hard to feel it correctly.
i think what you're feeling, the lack of feeling, is normal considering the circumstances.
while i can be very analytic about feelings and emotions, I have an overall numbness to them, yet i'll tear up during commercials.
"In a ham and eggs breakfast, the hen is involved, but the pig is committed".