Kristi, honey, I know exactly what you mean. My Nana passed last December (last, last December... 2001) and I don't feel like I've done sufficient grieving either.
As a result, I am completely hypersensitive to death. When my ex-boyfriend died a short while back, I cried and cried and guilted myself for all the things I couldn't possibly have known or done anything about.
It sucks. Can you talk to someone through EAP at your work? Would you even want to?
PM me, if you need to. Or even if you don't.