Sorry to hear this is all going on, lost.
I would suggest shutting off your phone and watching a funny movie with your son. With popcorn. And ice cream. Even if you can't really concentrate, it is a temporary distraction.
This is a real shock to your system and trying to resolve it AND process it at the same time doesn't give you the headspace to do anything constructive. You don't need any more information from him right now. This is not a misunderstanding, this is a bomb gone off.
In the meantime, I am sure the collective wisdom of SR can come up with some good links for you to read when you have the capacity to take them in. I'm heading out now but will put some up a bit later.