Going for a run sounds very wise...I think you're opening up to a lot of stuff that's been in you - and now you're ready to process it. Take it in bursts if you have to - remember, when a train starts up, it doesn't pull all the trains that follow at once - it takes one section at a time, with a small bit of space between cars...otherwise, getting going would be impossible.
That feeling of being overwhelmed sucks - but remember that it's a perspective - and right now it's a perspective colored by sadness and feelings of loss - how could that not be hard?
